The Quantum Circuits Laboratory

Danilin, S., Nugent, N., Weides, M. (2024) Quantum sensing with tunable superconducting qubits: optimization and speed-up. New Journal of Physics, 26, (doi: 10.1088/1367-2630/ad49c5)

Camley, R. E., Macedo, R., Livesey, K. L. (2024) Curie-Weiss behavior and the interaction temperature of magnetic nanoparticle ensembles: Local structure strongly affects the magnetic behavior. Physical Review B, 110, (doi: 10.1103/PhysRevB.110.144440)

Delfanazari, K. (2024) Ultrafast terahertz superconductor van der Waals metamaterial photonic switch. Advanced Photonics Research, 5, (doi: 10.1002/adpr.202400045)

Ma, P., Delfanazari, K., Puddy, R. K., Li, J., Cao, M., Yi, T., Griffiths, J. P., Beere, H. E., Ritchie, D. A., Kelly, M. J., Smith, C. G. (2024) Statistical evaluation of 571 GaAs quantum point contact transistors showing the 0.7 anomaly in quantized conductance using millikelvin cryogenic on-chip multiplexing. Chip, 3, (doi: 10.1016/j.chip.2024.100095)

Smith, M. A., Lafferty, A. L., Joseph, A., McMaster, M. R., Scott, J. N., Hendren, W. R., Bowman, R. M., Weides, M. P., Macedo, R. (2024) Observation of room temperature exchange cavity magnon-polaritons in metallic thin films. Advanced Quantum Technologies, 7, (doi: 10.1002/qute.202300420)

Paul, J., Seferai, V., Karar, W., Karami, K., Qu, C., Feng, H., Fu, C., Xi, S., AlKhalidi, M., Grant, J., Reynolds, P., Milne, D., Casey, B., Weides, M. (2024) Niobium Quantum Devices: From Fabrication to Measurement.

Fu, C., Cong, H., Seferai, V., Paul, J., Reynolds, P., Weides, M. P. (2024) Impedance-matched CPW high kinetic inductance parametric amplifier.

Delfanazari, K. (2024) On-chip coherent terahertz emitters with gigahertz modulation. Nature Photonics, 18, pp. 214-215. (doi: 10.1038/s41566-024-01399-x)

Baity, P. G., Maclean, C., Seferai, V., Bronstein, J., Shu, Y., Hemakumara, T., Weides, M. (2024) Circle fit optimization for resonator quality factor measurements: point redistribution for maximal accuracy. Physical Review Research, 6, (doi: 10.1103/PhysRevResearch.6.013329)

Paul, J., Seferai, V., Karami, K., Qu, C., Karar, W., Fu, C., Feng, H., Xi, S., AlKhalidi, M., Grant, J., Reynolds, P., Milne, D., Burt, D., Casey, B., Weides, M. (2024) Development of Superconducting Qubit and Circuit-Components for Advanced Quantum Technologies.

Delfanazari, K., Li, J., Ma, P., Puddy, R. K., Yi, T., Xiong, Y., Farrer, I., Komori, S., Robinson, J., Ritchie, D. A., Kelly, M. J., Joyce, H. J., Smith, C. G. (2024) Large-scale on-chip integration of gate-voltage addressable hybrid superconductor-semiconductor quantum wells field effect nano-switch arrays. Advanced Electronic Materials, 10, (doi: 10.1002/aelm.202300453)

Delfanazari, K., Li, J., Xiong, Y., Ma, P., Puddy, R. K., Yi, T., Farrer, I., Komori, S., Robinson, J. W.A., Serra, L., Ritchie, D. A., Kelly, M. J., Joyce, H. J., Smith, C. G. (2024) Quantized conductance in hybrid split-gate arrays of superconducting quantum point contacts with semiconducting two-dimensional electron systems. Physical Review Applied, 21, (doi: 10.1103/PhysRevApplied.21.014051)

Tyboroski, M., Macedo, R., Camley, R. E. (2023) Extreme enhancement of nonreciprocal wave propagation in magneto-optical metamaterials. Physical Review Materials, 7, (doi: 10.1103/PhysRevMaterials.7.125201)

Silva, R.L., Silva, R.C., Pereira, A.R., McEleney, C. A., Macêdo, R. (2023) Fractionalizing biskyrmions using magnons in a ferromagnetic thin film. Journal of Magnetism and Magnetic Materials, 586, (doi: 10.1016/j.jmmm.2023.171194)

Al-Moathin, A., Zhong, M., Al-Taai, Q., Jiang, Y., Farage, M., Kazim, J. u. R., Ali, M. Z., Nikbakhtnasrabadi, F., Powell, M., Khartri, P., Stanley, M., Rossi, A., Heidari, H., Imran, M. A., Abbasi, Q. H., Ridler, N. M., Weides, M., Li, C. (2023) Characterization of a Compact Wideband Microwave Metasurface Lens for Cryogenic Applications. (doi: 10.1109/ARFTG57476.2023.10279542)

Melnyk, O., Jones, R., Macêdo, R., Camley, R. E. (2023) New quasiperiodic structures in nematic liquid crystals. Soft Matter, 19, pp. 7644-7654. (doi: 10.1039/D3SM00884C)

Paul, J., Seferai, V., Karami, K., Bronstein, J., Grant, J., Reynolds, P., Thoms, S., Baity, P., Danilin, S., Burt, D., Mirando, F., Casey, B., Weides, M. (2023) Scalable and CMOS-Compatible Superconducting Qubit Fabrication Process for Quantum Computing Applications.

Paul, J., Seferai, V., Fu, C., Qu, C., McLurg, T., Reynolds, P., Baity, P., Weides, M. (2023) Fabrication of Airbridges for Superconducting Quantum Circuits.

Nugent, N., Bronstein, J., Paul, J., Kennedy, O., Dimitriadis, S., Lindstrom, T., Weides, M., Connolly, M. (2023) Flip-Chip Integration for Quantum Circuits.

Seferai, V., Baity, P., Barbosa, J., Collins, J., Foshat, P., Fu, C., Poorgholam Khanjari, S., Lennon, C., Paul, J., Silke, P., Knoops, H., Hemakumara, T., Delfanazari, K., Hadfield, R., Weides, M. (2023) Recent Material Developments for Superconducting Quantum Circuits.

Fu, C., Feng, H., Seferai, V., Paul, J., Weides, M. (2023) Single Step Kinetic Inductance Parametric Amplifier with Large Signal Gain.

Kazim, J. u. R., Ali, M. Z., Al-Moathin, A., Nikbakhtnasrabadi, F., Khatri, P., Powell, M., Stanley, M., Ridler, N. M., Rossi, A., Weides, M., Heidari, H., Imran, M. A., Abbasi, Q. H., Li, C. (2023) Wireless Microwave Signal Transmission for Cryogenic Applications. (doi: 10.1109/USNC-URSI52151.2023.10237549)

Stehli, A., Brehm, J. D., Wolz, T., Schneider, A., Rotzinger, H., Weides, M., Ustinov, A. V. (2023) Quantum emulation of the transient dynamics in the multistate Landau-Zener model. npj Quantum Information, 9, (doi: 10.1038/s41534-023-00731-7)

Jones, R., Camley, R. E., Macedo, R. (2023) Controlling asymmetric transmission in layered natural hyperbolic crystals. Optics and Laser Technology, 161, (doi: 10.1016/j.optlastec.2023.109210)

Kapoulea, S., Ahmad, M., Weides, M., Heidari, H. (2023) Cryo-CMOS Mixed-Signal Circuits for Scalable Quantum Computing: Challenges and Future Steps. (doi: 10.1109/ISCAS46773.2023.10182164)

Boventer, I., Simensen, H.T., Brekke, B., Weides, M., Anane, A., Kläui, M., Brataas, A., Lebrun, R. (2023) Antiferromagnetic cavity magnon polaritons in collinear and canted phases of hematite. Physical Review Applied, 19, (doi: 10.1103/PhysRevApplied.19.014071)

Zhang, M., Pirandola, S., Delfanazari, K. (2023) Millimetre-waves to terahertz SISO and MIMO continuous variable quantum key distribution. IEEE Transactions on Quantum Engineering, 4, (doi: 10.1109/TQE.2023.3266946)

Kalhor, S., Savel'ev, S., Delfanazari, K. (2022) Engineering ultrastrong coupling between Josephson plasmon polaritons and subwavelength microcavity arrays in silicon/van der Waals layered superconductor heterostructure for terahertz hybrid circuit cavity quantum electrodynamics. Physical Review B, 106, (doi: 10.1103/PhysRevB.106.245140)

Giagkoulovits, C., Ahmad, M., Nikbakhtnasrabadi, F., Imroze, F., Weides, M., Heidari, H. (2022) CryoCMOS Characterization Strategies and Challenges. (doi: 10.1109/ICECS202256217.2022.9971010)

Imroze, F., Nikbakhtnasrabadi, F., Danilin, S., Muhammad, A., Ahmad, M., Giagkoulovits, C., Heidari, H., Weides, M. (2022) Packaged CMOS cryogenic characterization for quantum computing applications. (doi: 10.1109/ICECS202256217.2022.9970996)

Foshat, P., Baity, P., Danilin, S., Safari, V., Poorgholam Khanjari, S., Zhang, M., Mukhanov, O. A., Hutchings, M., Hadfield, R., Imran, M., Weides, M., Delfanazari, K. (2022) Nitride-based superconducting coplanar waveguide resonator with an internal quality factor above one million.

Zhang, M., Foshat, P., Poorgholam Khanjari, S., Imran, M., Weides, M., Delfanazari, K. (2022) Quantum Key Distribution on microwave band for superconducting quantum computing.

Weides, M., Nugent, N., Paul, J., Seferai, V., Grant, J., Hemakumara, T., Shu, Y., Besprozyannyy, D., Renzas, R., Jo, M., Lindstrom, T. (2022) 3D Integration of Superconducting Chips with Through Silicon Vias.

Delfanazari, K., Ma, P., Li, J., Yi, T., Puddy, R., Farrer, I., Ritchie, D., Kelly, M., Joyce, H., Smith, C. (2022) Gate voltage-addressable quantum chips with arrays of hybrid superconducting two-dimensional electron gas quantum well field-effect switches.

Ahmad, M., Giagkoulovits, C., Danilin, S., Weides, M., Heidari, H. (2022) Scalable cryoelectronics for superconducting qubit control and readout. Advanced Intelligent Systems, 4, (doi: 10.1002/aisy.202200079)

Wu, X., McEleney, C. A., Shi, Z., González-Jiménez, M., Macêdo, R. (2022) Asymmetric reflection induced in reciprocal hyperbolic materials. ACS Photonics, 9, pp. 2774-2782. (doi: 10.1021/acsphotonics.2c00551)

Fu, C., Paul, J., Seferai, V., Danilin, S., Long, G., Hemakumara, T., Williams, J., Weides, M. (2022) Design and Fabrication of High Kinetic Inductance Parametric Amplifier.

Delfanazari, K., Muskens, O. L. (2022) Visible to Near-infrared Chip-integrated Tunable Optical Modulators Based on Niobium Plasmonic Nano-antenna and Nano-circuit Metasurface Arrays. (doi: 10.1109/PIERS55526.2022.9792866)

Zhang, M., Foshat, P., Poorgholam Khanjari, S., Imran, M., Weides, M., Delfanazari, K. (2022) Microwave Quantum Key Distribution with Cryogenic Microwave Components for Superconducting Quantum Computing.

Chumak, A. V. et al. (2022) Roadmap on spin-wave computing. IEEE Transactions on Magnetics, 58, (doi: 10.1109/TMAG.2022.3149664)

Foshat, P., Danilin, S., Baity, P., Seferai, V., Mukhanov, O., Hutchings, M., Hadfield, R., Imran, M., Weides, M., Delfanazari, K. (2022) Microwave Photonic Losses in Niobium Nitride-based Superconducting Resonator Array.

Paul, J., Weides, M., Hadfield, R. (2022) Fabrication of Superconducting-Devices for Quantum Technologies.

Kalhor, S., Kindness, S.J., Wallis, R., Beere, H.E., Ghanaatshoar, M., Degl'Innocenti, R., Kelly, M.J., Hofmann, S., Joyce, H.J., Ritchie, D.A., Delfanazari, K. (2022) Active Terahertz Modulator and Slow Light Metamaterial Devices with Hybrid Graphene-superconductor Coupled Split-ring Resonator Arrays. (doi: 10.1109/PIERS55526.2022.9792980)

Nugent, N., Paul, J., Seferai, V., Hemakumara, T., Grant, J., Jo, M., Shu, Y., Besprozyannyy, D., Lindstrom, T., Renzas, R., Weides, M. P. (2022) Atomic Layer Deposited Niobium and Titanium Nitrides for Superconducting Resonators and Superconducting Through Silicon Vias.

Seferai, V., Baity, P. G., Barbosa, J., Brennan, J., Collins, J. A., Danilin, S., Feng, H., Foshat, P., Fu, C., Karar, W., Lenon, C., Nugent, N., Paul, J., Casaburi, A., Delfanazari, K., Hadfield, R., Weides, M. P. (2022) Tantalum on Sapphire and Silicon Substrates for Superconducting Quantum Circuits.

Xiong, Y., Delfanazari, K. (2022) Engineering Circular Polarization in Chip-integrated High-Tc Superconducting THz Antennas. (doi: 10.1109/PIERS53385.2021.9694960)

Macêdo, R., Kudinoor, A. S., Livesey, K. L., Camley, R. E. (2022) Breaking space inversion-symmetry to obtain asymmetric spin-wave excitation in systems with nonuniform magnetic exchange. Advanced Electronic Materials, 8, (doi: 10.1002/aelm.202100435)

Danilin, S., Barbosa, J., Farage, M., Zhao, Z., Shang, X., Burnett, J., Ridler, N., Li, C., Weides, M. (2022) Engineering the microwave to infrared noise photon flux for superconducting quantum systems. EPJ Quantum Technology, 9, (doi: 10.1140/epjqt/s40507-022-00121-6)

(2022) Solid State Physics. Volume 73.

Wolz, T., McLellan, L., Schneider, A., Stehli, A., Brehm, J. D., Rotzinger, H., Ustinov, A. V., Weides, M. (2021) Frequency fluctuations of ferromagnetic resonances at millikelvin temperatures. Applied Physics Letters, 119, (doi: 10.1063/5.0063668)

Kalhor, S., Kindness, S. J., Wallis, R., Beere, H. E., Ghanaatshoar, M., Degl'Innocenti, R., Kelly, M. J., Hofmann, S., Joyce, H. J., Ritchie, D. A., Delfanazari, K. (2021) Active terahertz modulator and slow light metamaterial devices with hybrid graphene–superconductor photonic integrated circuits. Nanomaterials, 11, (doi: 10.3390/nano11112999)

Tyboroski, M., Macêdo, R., Camley, R. E. (2021) Nonreciprocity in millimeter wave devices using a magnetic grating metamaterial. Physical Review Materials, 5, (doi: 10.1103/PhysRevMaterials.5.115201)

Jones, R., Melnyk, O., Macedo, R., Camley, R. E. (2021) Vertically stacked soliton-like domain walls in nematic liquid crystals. Advanced Theory and Simulations, 4, (doi: 10.1002/adts.202100252)

Delfanazari, K. (2021) Quantum Terahertz Electronics: From Superconducting Coherent THz Light Sources to Ultracompact Waveguides and Photonic Integrated Circuitry with Quantum Materials.

Xiong, Y., Kashiwagi, T., Klemm, R. A., Kadowaki, K., Delfanazari, K. (2021) Voltage-controlled Polarization and Cavity Modes in Integrated Superconducting Coherent Terahertz Emitters.

Peng, J., Tang, G., Wang, L., Macêdo, R., Chen, H., Ren, J. (2021) Twist-induced near-field thermal switch using nonreciprocal surface magnon-polaritons. ACS Photonics, 8, pp. 2183-2189. (doi: 10.1021/acsphotonics.0c01934)

Kalhor, S., Ghanaatshoar, M., Joyce, H. J., Ritchie, D. A., Kadowaki, K., Delfanazari, K. (2021) Millimeter-wave-to-terahertz superconducting plasmonic waveguides for integrated nanophotonics at cryogenic temperatures. Materials, 14, (doi: 10.3390/ma14154291)

Baity, P. G., Bozhko, D. A., Macêdo, R., Smith, W., Holland, R. C., Danilin, S., Seferai, V., Barbosa, J., Peroor, R. R., Goldman, S., Nasti, U., Paul, J., Hadfield, R. H., McVitie, S., Weides, M. (2021) Strong magnon-photon coupling with chip-integrated YIG in the zero-temperature limit. Applied Physics Letters, 119, (doi: 10.1063/5.0054837)

Rossi, A., Baity, P. G., Schäfer, V. M., Weides, M. (2021) Quantum computing hardware in the cloud: Should a computational chemist care? International Journal of Quantum Chemistry, 121, (doi: 10.1002/qua.26688)

Paterson, G. W., Macauley, G. M., Macêdo, R. (2021) Field-driven reversal models in artificial spin ice. Advanced Theory and Simulations, 4, (doi: 10.1002/adts.202100109)

Golovchanskiy, I. A., Abramov, N. N., Stolyarov, V. S., Weides, M., Ryazanov, V. V., Golubov, A. A., Ustinov, A. V., Kupriyanov, M. Y. (2021) Ultrastrong photon-to-magnon coupling in multilayered heterostructures involving superconducting coherence via ferromagnetic layers. Science Advances, 7, (doi: 10.1126/sciadv.abe8638)

Chu, Y., Pritchard, J. D., Wang, H., Weides, M. (2021) Hybrid quantum devices: Guest editorial. Applied Physics Letters, 118, (doi: 10.1063/5.0057740)

Melnyk, O., Jones, R., Macedo, R., Garbovskiy, Y., Hagen, G., Glushchenko, A. V., Spendier, K., Camley, R. E. (2021) Fast switching dual-frequency nematic liquid crystal tunable filters. ACS Photonics, 8, pp. 1222-1231. (doi: 10.1021/acsphotonics.1c00151)

Baity, P. G., Bozhko, D., Macedo, R., Smith, W., Holland, R., Danilin, S., Seferai, V., Paul, J., Peroor, R. R., Nasti, U., McVitie, S., Casaburi, A., Hadfield, R., Weides, M. P. (2021) Strong Magnon-Photon Coupling On-Chip for YIG in the Zero-Temperature Limit.

Macêdo, R., Holland, R. C., Baity, P. G., McLellan, L. J., Livesey, K. L., Stamps, R. L., Weides, M. P., Bozhko, D. A. (2021) Electromagnetic approach to cavity spintronics. Physical Review Applied, 15, (doi: 10.1103/PhysRevApplied.15.024065)

Paul, J., Seferai, V., Weides, M. (2021) Optimising Process Fabrication of Superconducting Qubits.

Macedo, R. (2021) The 2021 magnetic hyperbolic polaritons roadmap. Academic Press

Delfanazari, K., Serra, L., Ma, P., Farrer, I., Ritchie, D., Joyce, H., Kelly, M. J., Smith, C. G. (2021) Topological Josephson Junctions Based on InGaAs Quantum Wells.

Macêdo, R., McEleney, C.A., González-Jiménez, M., Wu, X. (2020) Unidirectional light propagation in natural crystals. Optics and Photonics News, 31, pp. 53-53. (doi: 10.1364/OPN.31.12.000053)

Pitsun, D., Sultanov, A., Novikov, I., Mutsenik, E., Ivanov, B., Matanin, A., Polozov, V., Malevannaya, E., Ivanov, A., Fedorov, G., Delfanazari, K., Rodionov, I., Il’ichev, E. (2020) Cross coupling of a solid-state qubit to an input signal due to multiplexed dispersive readout. Physical Review Applied, 14, (doi: 10.1103/PhysRevApplied.14.054059)

Kindness, S. J., Almond, N. W., Michailow, W., Wei, B., Delfanazari, K., Braeuninger‐Weimer, P., Hofmann, S., Beere, H. E., Ritchie, D. A., Degl'Innocenti, R. (2020) A terahertz chiral metamaterial modulator. Advanced Optical Materials, 8, (doi: 10.1002/adom.202000581)

Stehli, A., Brehm, J. D., Wolz, T., Baity, P., Danilin, S., Seferai, V., Rotzinger, H., Ustinov, A. V., Weides, M. (2020) Coherent superconducting qubits from a subtractive junction fabrication process. Applied Physics Letters, 117, (doi: 10.1063/5.0023533)

Macedo, R., Stamps, R. L. (2020) Electromagnetic waves in canted magnets. World Scientific

Yang, P., Brehm, J. D., Leppäkangas, J., Guo, L., Marthaler, M., Boventer, I., Stehli, A., Wolz, T., Ustinov, A. V., Weides, M. (2020) Probing the Tavis-Cummings level splitting with intermediate-scale superconducting circuits. Physical Review Applied, 14, (doi: 10.1103/PhysRevApplied.14.024025)

Kristen, M., Schneider, A., Stehli, A., Wolz, T., Danilin, S., Ku, H.S., Long, J., Wu, X., Lake, R., Pappas, D.P., Ustinov, A.V., Weides, M. (2020) Amplitude and frequency sensing of microwave fields with a superconducting transmon qudit. npj Quantum Information, 6, (doi: 10.1038/s41534-020-00287-w)

Gebauer, R., Karcher, N., Gusenkova, D., Spiecker, M., Grünhaupt, L., Takmakov, I., Winkel, P., Planat, L., Roch, N., Wernsdorfer, W., Ustinov, A. V., Weber, M., Weides, M., Pop, I. M., Sander, O. (2020) State preparation of a fluxonium qubit with feedback from a custom FPGA-based platform. AIP Conference Proceedings, 2241, (doi: 10.1063/5.0011721)

Delfanazari, K., Klemm, R. A., Joyce, H. J., Ritchie, D. A., Kadowaki, K. (2020) Integrated, portable, tunable, and coherent terahertz sources and sensitive detectors based on layered superconductors. Proceedings of the IEEE, 108, pp. 721-734. (doi: 10.1109/JPROC.2019.2958810)

Rodrigues Lavor, I., Rabelo da Costa, D., Chaves, A., Farias, G. d. A., Macêdo, R., Peeters, F. M. (2020) Magnetic field induced vortices in graphene quantum dots. Journal of Physics: Condensed Matter, 32, (doi: 10.1088/1361-648X/ab6463)

Macauley, G. M., Paterson, G. W., Li, Y., Macêdo, R., McVitie, S., Stamps, R. L. (2020) Tuning magnetic order with geometry: thermalisation and defects in two-dimensional artificial spin ices. Physical Review B, 101, (doi: 10.1103/PhysRevB.101.144403)

Schön, Y., Voss, J. N., Wildermuth, M., Schneider, A., Skacel, S. T., Weides, M. P., Cole, J. H., Rotzinger, H., Ustinov, A. V. (2020) Rabi oscillations in a superconducting nanowire circuit. npj Quantum Materials, 5, (doi: 10.1038/s41535-020-0220-x)

Serra, L., Delfanazari, K. (2020) Evidence for Majorana phases in the magnetoconductance of topological junctions based on two-dimensional electron gases. Physical Review B, 101, (doi: 10.1103/PhysRevB.101.115409)

Delfanazari, K., Serra, L., Ma, P., Farrer, I., Ritchie, D. A., Joyce, H. J., Kelly, M. J., Smith, C. G. (2020) Hybrid quantum circuits in vertical magnetic fields.

Wolz, T., Stehli, A., Schneider, A., Boventer, I., Macêdo, R., Ustinov, A. V., Kläui, M., Weides, M. (2020) Introducing coherent time control to cavity magnon-polariton modes. Communications Physics, 3, (doi: 10.1038/s42005-019-0266-x)

Boventer, I., Dörflinger, C., Wolz, T., Macedo, R., Lebrun, R., Kläui, M., Weides, M. (2020) Control of the coupling strength and linewidth of a cavity magnon-polariton. Physical Review Research, 2, (doi: 10.1103/PhysRevResearch.2.013154)

Xiong, Y., Kashiwagi, T., Klemm, R.A., Kadowaki, K., Delfanazari, K. (2020) Engineering the Cavity modes and Polarization in Integrated Superconducting Coherent Terahertz Emitters. (doi: 10.1109/IRMMW-THz46771.2020.9370587)

Kalhor, S., Ghanaatshoar, M., Delfanazari, K. (2020) Guiding of Terahertz Photons in Superconducting Nano-Circuits. (doi: 10.1109/UCET51115.2020.9205480)

Kalhor, S., Ghanaatshoar, M., Delfanazari, K. (2020) On-chip Superconducting THz Metamaterial Bandpass Filter. (doi: 10.1109/IRMMW-THz46771.2020.9370663)

Porro, J. M., Morley, S. A., Venero, D. A., Macêdo, R., Rosamond, M. C., Linfield, E. H., Stamps, R. L., Marrows, C. H., Langridge, S. (2019) Magnetization dynamics of weakly interacting sub-100 nm square artificial spin ices. Scientific Reports, 9, (doi: 10.1038/s41598-019-56219-y)

Wu, X., McEleney, C. A., González-Jiménez, M., Macêdo, R. (2019) Emergent asymmetries and enhancement in the absorption of natural hyperbolic crystals. Optica, 6, pp. 1478-1483. (doi: 10.1364/OPTICA.6.001478)

Boventer, I., Kläui, M., Macêdo, R., Weides, M. (2019) Steering between level repulsion and attraction: broad tunability of two-port driven cavity magnon-polaritons. New Journal of Physics, 21, (doi: 10.1088/1367-2630/ab5c12)

Schlör, S., Lisenfeld, J., Müller, C., Bilmes, A., Schneider, A., Pappas, D. P., Ustinov, A. V., Weides, M. (2019) Correlating decoherence in transmon qubits: low frequency noise by single fluctuators. Physical Review Letters, 123, (doi: 10.1103/PhysRevLett.123.190502)

Paterson, G. W., Macauley, G. M., Li, Y., Macêdo, R., Ferguson, C., Morley, S. A., Rosamond, M. C., Linfield, E. H., Marrows, C. H., Stamps, R. L., McVitie, S. (2019) Heisenberg pseudo-exchange and emergent anisotropies in field-driven pinwheel artificial spin ice. Physical Review B, 100, (doi: 10.1103/PhysRevB.100.174410)

Pfirrmann, M., Boventer, I., Schneider, A., Wolz, T., Kläui, M., Ustinov, A. V., Weides, M. (2019) Magnons at low excitations: observation of incoherent coupling to a bath of two-level systems. Physical Review Research, 1, (doi: 10.1103/PhysRevResearch.1.032023)

Fritz, S., Radtke, L., Schneider, R., Luysberg, M., Weides, M., Gerthsen, D. (2019) Structural and nanochemical properties of AlOx layers in Al/AlOx/Al -layer systems for Josephson junctions. Physical Review Materials, 3, (doi: 10.1103/PhysRevMaterials.3.114805)

Proskurin, I., Macedo, R., Stamps, R. L. (2019) Microscopic origin of level attraction for a coupled magnon-photon system in a microwave cavity. New Journal of Physics, 21, (doi: 10.1088/1367-2630/ab3cb7)

Macauley, G. M., Paterson, G. W., Li, Y., Macêdo, R., McVitie, S., Stamps, R. L. (2019) Ice-rule made manifold: phase transitions, topological defects and manifold restoration in two-dimensional artificial spin systems. arXiv,

Yarbrough, P. M., Livesey, K. L., Camley, R. E., Macêdo, R. (2019) Far-infrared reflection from heterostructures made of ultrathin ferromagnetic layers. Physical Review Applied, 12, (doi: 10.1103/PhysRevApplied.12.024004)

Kindness, S. J., Almond, N. W., Michailow, W., Wei, B., Jakob, L. A., Delfanazari, K., Braeuninger-Weimer, P., Hofmann, S., Beere, H. E., Ritchie, D. A., Degl’Innocenti, R. (2019) Graphene-integrated metamaterial device for all-electrical polarization control of terahertz quantum cascade lasers. ACS Photonics, 6, pp. 1547-1555. (doi: 10.1021/acsphotonics.9b00411)

Wisbey, D. S., Vissers, M. R., Gao, J., Kline, J. S., Sandberg, M. O., Weides, M. P., Paquette, M.M., Karki, S., Brewster, J., Alameri, D., Kuljanishvili, I., Caruso, A. N., Pappas, D. P. (2019) Dielectric loss of boron-based dielectrics on niobium resonators. Journal of Low Temperature Physics, 195, pp. 474-486. (doi: 10.1007/s10909-019-02183-w)

Leppäkangas, J., Brehm, J. D., Yang, P., Guo, L., Marthaler, M., Ustinov, A. V., Weides, M. (2019) Resonance inversion in a superconducting cavity coupled to artificial atoms and a microwave background. Physical Review A: Atomic, Molecular and Optical Physics, 99, (doi: 10.1103/PhysRevA.99.063804)

Golovchanskiy, I.A., Abramov, N.N., Pfirrmann, M., Piskor, T., Voss, J.N., Baranov, D.S., Hovhannisyan, R.A., Stolyarov, V.S., Dubs, C., Golubov, A.A., Ryazanov, V.V., Ustinov, A.V., Weides, M. (2019) Interplay of magnetization dynamics with a microwave waveguide at cryogenic temperatures. Physical Review Applied, 11, (doi: 10.1103/PhysRevApplied.11.044076)

Fritz, S., Radtke, L., Schneider, R., Weides, M., Gerthsen, D. (2019) Optimization of Al/AlOx/Al-layer systems for Josephson junctions from a microstructure point of view. Journal of Applied Physics, 125, (doi: 10.1063/1.5089871)

Li, Y., Paterson, G. W., Macauley, G. M., Nascimento, F. S., Ferguson, C., Morley, S. A., Rosamond, M. C., Linfield, E. H., MacLaren, D. A., Macedo, R., Marrows, C. H., McVitie, S., Stamps, R. L. (2019) Superferromagnetism and domain-wall topologies in artificial 'pinwheel' spin ice. ACS Nano, 13, pp. 2213-2222. (doi: 10.1021/acsnano.8b08884)

Delfanazari, K., Ma, P., Puddy, R., Yi, T., Cao, M., Gul, Y., Richardson, C. L., Farrer, I., Ritchie, D., Joyce, H. J., Kelly, M. J., Smith, C. G. (2019) Scalable quantum integrated circuits on superconducting two-dimensional electron gas platform. Journal of Visualized Experiments, (doi: 10.3791/57818)

Macedo, R., Camley, R. E. (2019) Engineering terahertz surface magnon-polaritons in hyperbolic antiferromagnets. Physical Review B, 99, (doi: 10.1103/PhysRevB.99.014437)

Delfanazari, K., Ma, P., Puddy, R. K., Cao, M., Yi, T., Gul, Y., Farrer, I., Ritchie, D. A., Joyce, H. J., Kelly, M. J., Smith, C. G. (2019) Andreev reflections and magnetotransport in 2D Josephson junctions. Journal of Physics: Conference Series, 1182, pp. 012010. (doi: 10.1088/1742-6596/1182/1/012010)

Delfanazari, K., Klemm, R. A., Tsujimoto, M., Cerkoney, D. P., Yamamoto, T., Kashiwagi, T., Kadowaki, K. (2019) Cavity modes in broadly tunable superconducting coherent terahertz sources. Journal of Physics: Conference Series, 1182, (doi: 10.1088/1742-6596/1182/1/012011)

Schneider, A., Wolz, T., Pfirrmann, M., Spiecker, M., Rotzinger, H., Ustinov, A. V., Weides, M. (2019) Transmon qubit in a magnetic field: evolution of coherence and transition frequency. Physical Review Research, 1, (doi: 10.1103/PhysRevResearch.1.023003)

Macêdo, R., Dumelow, T., Camley, R. E., Stamps, R. L. (2018) Oriented asymmetric wave propagation and refraction bending in hyperbolic media. ACS Photonics, 5, pp. 5086-5094. (doi: 10.1021/acsphotonics.8b01402)

Hamann, A. R., Muller, C., Jerger, M., Zanner, M., Combes, J., Pletyukhov, M., Weides, M., M. Stace, T., Fedorov, A. (2018) Nonreciprocity realized with quantum nonlinearity. Physical Review Letters, 121, (doi: 10.1103/PhysRevLett.121.123601)

Macêdo, R., Livesey, K. L., Camley, R. E. (2018) Using magnetic hyperbolic metamaterials as high frequency tunable filters. Applied Physics Letters, 113, (doi: 10.1063/1.5049602)

Delfanazari, K., Puddy, R.K., Ma, P., Yi, T., Cao, M., Gul, Y., Farrer, I., Ritchie, D.A., Joyce, H.J., Kelly, M.J., Smith, C.G. (2018) Proximity induced superconductivity in indium gallium arsenide quantum wells. Journal of Magnetism and Magnetic Materials, 459, pp. 282-284. (doi: 10.1016/j.jmmm.2017.10.057)

Macêdo, R., Macauley, G.M., Nascimento, F.S., Stamps, R.L. (2018) Apparent ferromagnetism in the 'pinwheel' artificial spin ice. Physical Review B, 98, (doi: 10.1103/PhysRevB.98.014437)

Schneider, A., Braümuller, J., Guo, L., Stehle, P., Rotzinger, H., Marthaler, M., Ustinov, A. V., Weides, M. (2018) Local sensing with the multilevel ac Stark effect. Physical Review A: Atomic, Molecular and Optical Physics, 97, (doi: 10.1103/PhysRevA.97.062334)

Delfanazari, K., Kelly, M. J., Smith, C. G., Puddy, R. K., Ma, P., Yi, T., Cao, M., Richardson, C., Farrer, I., Ritchie, D. A., Joyce, H. J. (2018) On-chip hybrid superconducting-semiconducting quantum circuit. IEEE Transactions on Applied Superconductivity, 28, (doi: 10.1109/TASC.2018.2812817)

Fritz, S., Seiler, A., Radtke, L., Schneider, R., Weides, M., Weiß, G., Gerthsen, D. (2018) Correlating the nanostructure of Al-oxide with deposition conditions and dielectric contributions of two-level systems in perspective of superconducting quantum circuits. Scientific Reports, 8, (doi: 10.1038/s41598-018-26066-4)

Boventer, I., Pfirrmann, M., Krause, J., Schön, Y., Kläui, M., Weides, M. (2018) Complex temperature dependence of coupling and dissipation of cavity magnon polaritons from millikelvin to room temperature. Physical Review B, 97, (doi: 10.1103/PhysRevB.97.184420)

Leppäkangas, J., Braumüller, J., Hauck, M., Reiner, J.-M., Schwenk, I., Zanker, S., Fritz, L., Ustinov, A. V., Weides, M., Marthaler, M. (2018) Quantum simulation of the spin-boson model with a microwave circuit. Physical Review A: Atomic, Molecular and Optical Physics, 97, (doi: 10.1103/PhysRevA.97.052321)

Delfanazari, K., Puddy, R. K., Ma, P., Yi, T., Cao, M., Gul, Y., Farrer, I., Ritchie, D. A., Joyce, H. J., Kelly, M. J., Smith, C. G. (2017) On‐chip Andreev devices: hard superconducting gap and quantum transport in ballistic Nb–In 0.75 Ga 0.25 As‐quantum‐well–Nb Josephson junctions. Advanced Materials, 29, (doi: 10.1002/adma.201701836)

Kalhor, S., Ghanaatshoar, M., Kashiwagi, T., Kadowaki, K., Kelly, M. J., Delfanazari, K. (2017) Thermal tuning of high-Tc superconducting Bi2Sr 2CaCu2 O8+δ terahertz metamaterial. IEEE Photonics Journal, 9, (doi: 10.1109/JPHOT.2017.2754465)

Grünhaupt, L., von Lüpke, U., Gusenkova, D., Skacel, S. T., Maleeva, N., Schlör, S., Bilmes, A., Rotzinger, H., Ustinov, A. V., Weides, M., Pop, I. M. (2017) An argon ion beam milling process for native AlOx layers enabling coherent superconducting contacts. Applied Physics Letters, 111, (doi: 10.1063/1.4990491)

Weides, M. (2017) Barriers in Josephson junctions: an overview. Oxford University Press

Shulga, K.V., Yang, P., Fedorov, G.P., Fistul, M.V., Weides, M., Ustinov, A.V. (2017) Observation of a collective mode of an array of transmon qubits. JETP Letters, 105, pp. 47-50. (doi: 10.1134/S0021364017010143)

Braumüller, J., Marthaler, M., Schneider, A., Stehli, A., Rotzinger, H., Weides, M., Ustinov, A. V. (2017) Analog quantum simulation of the Rabi model in the ultra-strong coupling regime. Nature Communications, 8, (doi: 10.1038/s41467-017-00894-w)

Klemm, R., Cerkoney, D., Doty, C., Davis, A., Wang, Q., Koopman, M., Rain, J., Reid, C., Campbell, T., Morales, M., Delfanazari, K., Tsujimoto, M., Kashiwagi, T., Watanabe, C., Minami, H., Yamamoto, T., Kadowaki, K. (2017) Coherent emission from the intrinsic Josephson junctions in thermally-managed, high-symmetry Bi2Sr2CaCu2O8+δ devices.

Macêdo, R. (2017) Tunable hyperbolic media: magnon-polaritons in canted antiferromagnets. Elsevier

Weides, M., Rotzinger, H. (2016) Advanced superconducting circuits and devices. Wiley-VCH

Rotzinger, H., Skacel, S.T., Pfirrmann, M., Voss, J.N., Münzberg, J., Probst, S., Bushev, P., Weides, M.P., Ustinov, A.V., Mooij, J.E. (2016) Aluminium-oxide wires for superconducting high kinetic inductance circuits. Superconductor Science and Technology, 30, (doi: 10.1088/0953-2048/30/2/025002)

Cerkoney, D. P., Reid, C., Doty, C. M., Gramajo, A., Campbell, T. D., Morales, M. A., Delfanazari, K., Tsujimoto, M., Kashiwagi, T., Yamamoto, T., Watanabe, C., Minami, H., Kadowaki, K., Klemm, R. A. (2016) Cavity mode enhancement of terahertz emission from equilateral triangular microstrip antennas of the high-Tcsuperconductor Bi2Sr2CaCu2O8 +δ. Journal of Physics: Condensed Matter, 29, (doi: 10.1088/0953-8984/29/1/015601)

Menditto, R., Sickinger, H., Weides, M., Kohlstedt, H., Koelle, D., Kleiner, R., Goldobin, E. (2016) Tunable φ Josephson junction ratchet. Physical Review E, 94, (doi: 10.1103/PhysRevE.94.042202)

Reiner, J.-M., Marthaler, M., Braumüller, J., Weides, M., Schön, G. (2016) Emulating the one-dimensional Fermi-Hubbard model by a double chain of qubits. Physical Review A: Atomic, Molecular and Optical Physics, 94, (doi: 10.1103/PhysRevA.94.032338)

Macêdo, R., Dumelow, T., Stamps, R. L. (2016) Tunable focusing in natural hyperbolic magnetic media. ACS Photonics, 3, pp. 1670-1677. (doi: 10.1021/acsphotonics.6b00321)

Menditto, R., Sickinger, H., Weides, M., Kohlstedt, H., Žonda, M., Novotný, T., Koelle, D., Kleiner, R., Goldobin, E. (2016) Phase retrapping in aφJosephson junction: onset of the butterfly effect. Physical Review B, 93, (doi: 10.1103/PhysRevB.93.174506)

Braumüller, J., Sandberg, M., Vissers, M. R., Schneider, A., Schlör, S., Grünhaupt, L., Rotzinger, H., Marthaler, M., Lukashenko, A., Dieter, A., Ustinov, A. V., Weides, M., Pappas, D. P. (2016) Concentric transmon qubit featuring fast tunability and an anisotropic magnetic dipole moment. Applied Physics Letters, 108, (doi: 10.1063/1.4940230)

Savinov, V., Delfanazari, K., Fedotov, V. A., Zheludev, N. I. (2016) Giant nonlinearity in a superconducting sub-terahertz metamaterial. Applied Physics Letters, 108, (doi: 10.1063/1.4943649)

Gaskell, J. M., Afzaal, M., Sheel, D. W., Yates, H. M., Delfanazari, K., Muskens, O. L. (2016) Optimised atmospheric pressure CVD of monoclinic VO2 thin films with picosecond phase transition. Surface and Coatings Technology, 287, pp. 160-165. (doi: 10.1016/j.surfcoat.2015.12.090)

Macêdo, R., Dumelow, T., Stamps, R.L. (2015) Tunable Magneto-Optical Effects in Antiferromagnetic Structures. (doi: 10.1109/MetaMaterials.2015.7342485)

Heim, D.M., Pugach, N.G., Kupriyanov, M. Y., Goldobin, E., Koelle, D., Kleiner, R., Ruppelt, N., Weides, M., Kohlstedt, H. (2015) The effect of normal and insulating layers on 0-πtransitions in Josephson junctions with a ferromagnetic barrier. New Journal of Physics, 17, (doi: 10.1088/1367-2630/17/11/113022)

Kashiwagi, T., Yamamoto, T., Minami, H., Tsujimoto, M., Yoshizaki, R., Delfanazari, K., Kitamura, T., Watanabe, C., Nakade, K., Yasui, T., Asanuma, K., Saiwai, Y., Shibano, Y., Enomoto, T., Kubo, H., Sakamoto, K., Katsuragawa, T., Marković, B., Mirković, J., Klemm, R. A., Kadowaki, K. (2015) Efficient fabrication of intrinsic-Josephson-junction terahertz oscillators with greatly reduced self-heating effects. Physical Review Applied, 4, (doi: 10.1103/PhysRevApplied.4.054018)

Delfanazari, K., Savinov, V., Muskens, O.L., Zheludev, N.I. (2015) Optical superconducting plasmonic metamaterial.

Delfanazari, K., Asai, H., Tsujimoto, M., Kashiwagi, T., Kitamura, T., Yamamoto, T., Wilson, W., Klemm, R. A., Hattori, T., Kadowaki, K. (2015) Effect of bias electrode position on terahertz radiation from pentagonal mesas of superconducting Bi2Sr2CaCu2O8+δ. IEEE Transactions on Terahertz Science and Technology, 5, pp. 505-511. (doi: 10.1109/TTHZ.2015.2409552)

Delfanazari, K., Savinov, V., Muskens, O. L., Zheludev, N. I. (2015) Superconducting Metamaterial: Resonant Response at Visible Wavelengths.

Przybysz, J. X., Miller, D. L., Toepfer, H., Mukhanov, O., Lisenfeld, J., Weides, M., Rotzinger, H., Febvre, P. (2015) Superconductor digital electronics. Wiley

Braumüller, J., Cramer, J., Schlör, S., Rotzinger, H., Radtke, L., Lukashenko, A., Yang, P., Skacel, S. T., Probst, S., Marthaler, M., Guo, L., Ustinov, A. V., Weides, M. (2015) Multiphoton dressing of an anharmonic superconducting many-level quantum circuit. Physical Review B, 91, (doi: 10.1103/PhysRevB.91.054523)

Delfanazari, K., Savinov, V., Muskens, O., Zheludev, N. I. (2015) Resonant Response of Superconducting Metamaterial at Optical Frequencies.

Delfanazari, K., Takanari, K., Tsujimoto, M., Kitamura, T., Asai, H., Yamamoto, T., Wilson, W., Klemm, R. A., Hattori, T., Kadowaki, K. (2015) Broadband High-Tc Superconducting Terahertz Emitter Devices: A Comparison between Differently Shaped Devices.

Probst, S., Song, F.B., Bushev, P.A., Ustinov, A.V., Weides, M. (2015) Efficient and robust analysis of complex scattering data under noise in microwave resonators. Review of Scientific Instruments, 86, (doi: 10.1063/1.4907935)

Kashiwagi, T., Yamamoto, T., Kitamura, T., Asanuma, K., Watanabe, C., Nakade, K., Yasui, T., Saiwai, Y., Shibano, Y., Kubo, H., Sakamoto, K., Katsuragawa, T., Tsujimoto, M., Delfanazari, K., Yoshizaki, R., Minami, H., Klemm, R. A., Kadowaki, K. (2015) Generation of electromagnetic waves from 0.3 to 1.6 terahertz with a high- Tc superconducting Bi2Sr2CaCu2O8+δ intrinsic Josephson junction emitter. Applied Physics Letters, 106, (doi: 10.1063/1.4914083)

Delfanazari, K., Asai, H., Tsujimoto, M., Kashiwagi, T., Kitamura, T., Yamamoto, T., Wilson, W., Klemm, R. A., Hattori, T., Kadowaki, K. (2015) The influence of electrode position on the current-voltage characteristics and terahertz radiation in a high-Tc superconducting device. (doi: 10.1109/IRMMW-THz.2015.7327928)