Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Petersson, K. D."'
Autor:
Hertel, A., Eichinger, M., Andersen, L. O., van Zanten, D. M. T., Kallatt, S., Scarlino, P., Kringhøj, A., Chavez-Garcia, J. M., Gardner, G. C., Gronin, S., Manfra, M. J., Gyenis, A., Kjaergaard, M., Marcus, C. M., Petersson, K. D.
Publikováno v:
Phys. Rev. Applied 18, 034042 (2022)
We present a gate-voltage tunable transmon qubit (gatemon) based on planar InAs nanowires that are selectively grown on a high resistivity silicon substrate using III-V buffer layers. We show that low loss superconducting resonators with an internal
Externí odkaz:
http://arxiv.org/abs/2202.10860
Autor:
Erlandsson, O., Sabonis, D., Kringhøj, A., Larsen, T. W., Krogstrup, P., Petersson, K. D., Marcus, C. M.
Publikováno v:
Phys. Rev. B 108, L121406 (2023)
The rate of charge-parity switching in a full-shell superconductor-semiconductor nanowire qubit is measured by directly monitoring the dispersive shift of a readout resonator. At zero magnetic field, the measured switching time scale $T_P$ is on the
Externí odkaz:
http://arxiv.org/abs/2202.05974
Autor:
Hertel, A., Andersen, L. O., van Zanten, D. M. T., Eichinger, M., Scarlino, P., Yadav, S., Karthik, J., Gronin, S., Gardner, G. C., Manfra, M. J., Marcus, C. M., Petersson, K. D.
Publikováno v:
Phys. Rev. Applied 16, 044015 (2021)
We present a superconductor-semiconductor material system that is both scalable and monolithically integrated on a silicon substrate. It uses selective area growth of Al-InAs hybrid structures on a planar III-V buffer layer, grown directly on a high
Externí odkaz:
http://arxiv.org/abs/2104.03621
Autor:
Kringhøj, A., Larsen, T. W., Erlandsson, O., Uilhoorn, W., Kroll, J. G., Hesselberg, M., McNeil, R. P. G., Krogstrup, P., Casparis, L., Marcus, C. M., Petersson, K. D.
Publikováno v:
Phys. Rev. Applied 15, 054001 (2021)
We present a hybrid semiconductor-based superconducting qubit device which remains coherent at magnetic fields up to 1 T. The qubit transition frequency exhibits periodic oscillations with magnetic field, consistent with interference effects due to t
Externí odkaz:
http://arxiv.org/abs/2101.05194
Autor:
Kringhøj, A., Winkler, G. W., Larsen, T. W., Sabonis, D., Erlandsson, O., Krogstrup, P., van Heck, B., Petersson, K. D., Marcus, C. M.
Publikováno v:
Phys. Rev. Lett. 126, 047701 (2021)
We investigate transmon qubits made from semiconductor nanowires with a fully surrounding superconducting shell. In the regime of reentrant superconductivity associated with the destructive Little-Parks effect, numerous coherent transitions are obser
Externí odkaz:
http://arxiv.org/abs/2008.10013
Autor:
Larsen, T. W., Gershenson, M. E., Casparis, L., Kringhøj, A., Pearson, N. J., McNeil, R. P. G., Kuemmeth, F., Krogstrup, P., Petersson, K. D., Marcus, C. M.
Publikováno v:
Phys. Rev. Lett. 125, 056801 (2020)
Coherence of superconducting qubits can be improved by implementing designs that protect the parity of Cooper pairs on superconducting islands. Here, we introduce a parity-protected qubit based on voltage-controlled semiconductor nanowire Josephson j
Externí odkaz:
http://arxiv.org/abs/2004.03975
Autor:
Kringhøj, A., van Heck, B., Larsen, T. W., Erlandsson, O., Sabonis, D., Krogstrup, P., Casparis, L., Petersson, K. D., Marcus, C. M.
Publikováno v:
Phys. Rev. Lett. 124, 246803 (2020)
We demonstrate strong suppression of charge dispersion in a semiconductor-based transmon qubit across Josephson resonances associated with a quantum dot in the junction. On resonance, dispersion is drastically reduced compared to conventional transmo
Externí odkaz:
http://arxiv.org/abs/1911.10011
Autor:
Kringhøj, A., Larsen, T. W., van Heck, B., Sabonis, D., Erlandsson, O., Petkovic, I., Pikulin, D. I., Krogstrup, P., Petersson, K. D., Marcus, C. M.
Publikováno v:
Phys. Rev. Lett. 124, 056801 (2020)
Creating a transmon qubit using semiconductor-superconductor hybrid materials not only provides electrostatic control of the qubit frequency, it also allows parts of the circuit to be electrically connected and disconnected in situ by operating a sem
Externí odkaz:
http://arxiv.org/abs/1910.08200
Autor:
Casparis, L., Pearson, N. J., Kringhøj, A., Larsen, T. W., Kuemmeth, F., Nygård, J., Krogstrup, P., Petersson, K. D., Marcus, C. M.
Publikováno v:
Phys. Rev. B 99, 085434 (2019)
We demonstrate the ability of an epitaxial semiconductor-superconductor nanowire to serve as a field-effect switch to tune a superconducting cavity. Two superconducting gatemon qubits are coupled to the cavity, which acts as a quantum bus. Using a ga
Externí odkaz:
http://arxiv.org/abs/1802.01327
Autor:
Kringhøj, A., Casparis, L., Hell, M., Larsen, T. W., Kuemmeth, F., Leijnse, M., Flensberg, K., Krogstrup, P., Nygård, J., Petersson, K. D., Marcus, C. M.
Publikováno v:
Phys. Rev. B 97, 060508 (2018)
Coherent operation of gate-voltage-controlled hybrid transmon qubits (gatemons) based on semiconductor nanowires was recently demonstrated. Here we experimentally investigate the anharmonicity in epitaxial InAs-Al Josephson junctions, a key parameter
Externí odkaz:
http://arxiv.org/abs/1703.05643