Zobrazeno 1 - 10
of 126
pro vyhledávání: '"Kümmeth F"'
Autor:
Patomäki, S. M., Williams, J., Berritta, F., Laine, C., Fogarty, M. A., Leon, R. C. C., Jussot, J., Kubicek, S., Chatterjee, A., Govoreanu, B., Kuemmeth, F., Morton, J. J. L., Gonzalez-Zalba, M. F.
Publikováno v:
Phys. Rev. Applied 21, 054042 (2024)
Increasing the separation between semiconductor quantum dots offers scaling advantages by fa- cilitating gate routing and the integration of sensors and charge reservoirs. Elongated quantum dots have been utilized for this purpose in GaAs heterostruc
Externí odkaz:
http://arxiv.org/abs/2301.01650
Autor:
Nguyen, H. Q., Sabonis, D., Razmadze, D., Mannila, E. T., Maisi, V. F., van Zanten, D. M. T., O'Farrell, E. C. T., Krogstrup, P., Kuemmeth, F., Pekola, J. P., Marcus, C. M.
Publikováno v:
Phys. Rev. B 108, L041302 (2023)
The performance of superconducting devices is often degraded by the uncontrolled appearance and disappearance of quasiparticles, a process known as poisoning. We demonstrate electrostatic control of quasiparticle poisoning in the form of single-charg
Externí odkaz:
http://arxiv.org/abs/2202.05970
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:
Hutin, L., Bertrand, B., Chanrion, E., Bohuslavskyi, H., Ansaloni, F., Yang, T. -Y., Michniewicz, J., Niegemann, D. J., Spence, C., Lundberg, T., Chatterjee, A., Crippa, A., Li, J., Maurand, R., Jehl, X., Sanquer, M., Gonzalez-Zalba, M. F., Kuemmeth, F., Niquet, Y. -M., De Franceschi, S., Urdampilleta, M., Meunier, T., Vinet, M.
Publikováno v:
2019 IEEE International Electron Devices Meeting (IEDM)
We fabricated linear arrangements of multiple splitgate devices along an SOI mesa, thus forming a 2xN array of individually controllable Si quantum dots (QDs) with nearest neighbor coupling. We implemented two different gate reflectometry-based reado
Externí odkaz:
http://arxiv.org/abs/1912.10884
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
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Autor:
Albrecht, S. M., Hansen, E. B., Higginbotham, A. P., Kuemmeth, F., Jespersen, T. S., Nygård, J., Krogstrup, P., Danon, J., Flensberg, K., Marcus, C. M.
Publikováno v:
Phys. Rev. Lett. 118, 137701 (2017)
We investigate effects of quasiparticle poisoning in a Majorana island with strong tunnel coupling to normal-metal leads. In addition to the main Coulomb blockade diamonds, "shadow" diamonds appear, shifted by 1e in gate voltage, consistent with tran
Externí odkaz:
http://arxiv.org/abs/1612.05748
Autor:
Albrecht, S. M., Higginbotham, A. P., Madsen, M., Kuemmeth, F., Jespersen, T. S., Nygård, J., Krogstrup, P., Marcus, C. M.
Publikováno v:
Nature 531, 206 (2016)
Majorana zero modes are quasiparticle excitations in condensed matter systems that have been proposed as building blocks of fault-tolerant quantum computers [1]. They are expected to exhibit non-Abelian particle statistics, in contrast to the usual s
Externí odkaz:
http://arxiv.org/abs/1603.03217
Autor:
Malinowski, F. K., Martins, F., Nissen, P. D., Barnes, E., Cywiński, Ł., Rudner, M. S., Fallahi, S., Gardner, G. C., Manfra, M. J., Marcus, C. M., Kuemmeth, F.
Publikováno v:
Nat. Nanotechnol. 12, 16-20 (2017)
Electron spins in gate-defined quantum dots provide a promising platform for quantum computation. In particular, spin-based quantum computing in gallium arsenide takes advantage of the high quality of semiconducting materials, reliability in fabricat
Externí odkaz:
http://arxiv.org/abs/1601.06677