Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Casparis L"'
Autor:
Harlech-Jones, B., Waddy, S. J., Witt, J. D. S., Govender, D., Casparis, L., Martinez, E., Kallaher, R., Gronin, S., Gardner, G., Manfra, M. J., Reilly, D. J.
We report microwave impedance measurements of a superconductor-semiconductor hybrid nanowire device with three terminals (3T). Our technique makes use of transmission line resonators to acquire the nine complex scattering matrix parameters (S-paramet
Externí odkaz:
http://arxiv.org/abs/2207.12516
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:
Puglia, D., Martinez, E. A., Ménard, G. C., Pöschl, A., Gronin, S., Gardner, G. C., Kallaher, R., Manfra, M. J., Marcus, C. M., Higginbotham, A. P., Casparis, L.
Publikováno v:
Phys. Rev. B 103, 235201 (2021)
Hybrid superconductor-semiconductor nanowires are predicted to undergo a field-induced phase transition from a trivial to a topological superconductor, marked by the closure and re-opening of the excitation gap, followed by the emergence of Majorana
Externí odkaz:
http://arxiv.org/abs/2006.01275
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:
Anselmetti, G. L. R., Martinez, E. A., Ménard, G. C., Puglia, D., Malinowski, F. K., Lee, J. S., Choi, S., Pendharkar, M., Palmstrøm, C. J., Marcus, C. M., Casparis, L., Higginbotham, A. P.
Publikováno v:
Phys. Rev. B 100, 205412 (2019)
End-to-end correlated bound states are investigated in superconductor-semiconductor hybrid nanowires at zero magnetic field. Peaks in subgap conductance are independently identified from each wire end, and a cross-correlation function is computed tha
Externí odkaz:
http://arxiv.org/abs/1908.05549
Autor:
Ménard, G. C., Anselmetti, G. L. R., Martinez, E. A., Puglia, D., Malinowski, F. K., Lee, J. S., Choi, S., Pendharkar, M., Palmstrøm, C. J., Flensberg, K., Marcus, C. M., Casparis, L., Higginbotham, A. P.
Publikováno v:
Phys. Rev. Lett. 124, 036802 (2020)
We present conductance-matrix measurements of a three-terminal superconductor-semiconductor hybrid device consisting of two normal leads and one superconducting lead. Using a symmetry decomposition of the conductance, we find that the antisymmetric c
Externí odkaz:
http://arxiv.org/abs/1905.05505
Autor:
Vaitiekėnas, S., Whiticar, A. M., Deng, M. T., Krizek, F., Sestoft, J. E., Palmstrøm, C. J., Marti-Sanchez, S., Arbiol, J., Krogstrup, P., Casparis, L., Marcus, C. M.
Publikováno v:
Phys. Rev. Lett. 121, 147701 (2018)
We introduce selective area grown hybrid InAs/Al nanowires based on molecular beam epitaxy, allowing arbitrary semiconductor-superconductor networks containing loops and branches. Transport reveals a hard induced gap and unpoisoned 2e-periodic Coulom
Externí odkaz:
http://arxiv.org/abs/1802.04210
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