Zobrazeno 1 - 10
of 180
pro vyhledávání: '"Kuemmeth, 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
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
Autor:
Casparis, L., Larsen, T. W., Olsen, M. S., Kuemmeth, F., Krogstrup, P., Nygård, J., Petersson, K. D., Marcus, C. M.
Publikováno v:
Phys. Rev. Lett. 116, 150505 (2016)
Recent experiments have demonstrated superconducting transmon qubits with semiconductor nanowire Josephson junctions. These hybrid gatemon qubits utilize field effect tunability characteristic for semiconductors to allow complete qubit control using
Externí odkaz:
http://arxiv.org/abs/1512.09195