Zobrazeno 1 - 10
of 49
pro vyhledávání: '"van Heck, Bernard"'
Autor:
Vakhtel, Tereza, van Heck, Bernard
Publikováno v:
Phys. Rev. B 107, 195405 (2023)
We investigate the consequences of resonant tunneling of Cooper pairs on the quantum phase slips occurring in a Josephson junction. The amplitude for quantum tunneling under the Josephson potential barrier is modified by the Landau-Zener amplitude of
Externí odkaz:
http://arxiv.org/abs/2211.05660
Publikováno v:
J. Low Temp. Phys. 210, 588-609 (2023)
We report recent progress towards the realization of a sub-mK, low-vibration environment at the bottom stage of a dry dilution refrigerator for use in mechanical tests of quantum mechanics. Using adiabatic nuclear demagnetization, we have cooled a si
Externí odkaz:
http://arxiv.org/abs/2208.11750
Autor:
Pita-Vidal, Marta, Bargerbos, Arno, Žitko, Rok, Splitthoff, Lukas J., Grünhaupt, Lukas, Wesdorp, Jaap J., Liu, Yu, Kouwenhoven, Leo P., Aguado, Ramón, van Heck, Bernard, Kou, Angela, Andersen, Christian Kraglund
Publikováno v:
Nature Physics 19, 1110-1115 (2023)
Spin qubits in semiconductors are currently one of the most promising architectures for quantum computing. However, they face challenges in realizing multi-qubit interactions over extended distances. Superconducting spin qubits provide a promising al
Externí odkaz:
http://arxiv.org/abs/2208.10094
Autor:
Bargerbos, Arno, Pita-Vidal, Marta, Žitko, Rok, Splitthoff, Lukas J., Grünhaupt, Lukas, Wesdorp, Jaap J., Liu, Yu, Kouwenhoven, Leo P., Aguado, Ramón, Andersen, Christian Kraglund, Kou, Angela, van Heck, Bernard
Publikováno v:
Phys. Rev. Lett. 131, 097001 (2023)
We use a hybrid superconductor-semiconductor transmon device to perform spectroscopy of a quantum dot Josephson junction tuned to be in a spin-1/2 ground state with an unpaired quasiparticle. Due to spin-orbit coupling, we resolve two flux-sensitive
Externí odkaz:
http://arxiv.org/abs/2208.09314
Autor:
Bargerbos, Arno, Pita-Vidal, Marta, Žitko, Rok, Ávila, Jesús, Splitthoff, Lukas J., Grünhaupt, Lukas, Wesdorp, Jaap J., Andersen, Christian K., Liu, Yu, Kouwenhoven, Leo P., Aguado, Ramón, Kou, Angela, van Heck, Bernard
Publikováno v:
PRX Quantum 3, 030311 (2022)
We realize a hybrid superconductor-semiconductor transmon device in which the Josephson effect is controlled by a gate-defined quantum dot in an InAs/Al nanowire. Microwave spectroscopy of the transmon's transition spectrum allows us to probe the gro
Externí odkaz:
http://arxiv.org/abs/2202.12754
Autor:
Splitthoff, Lukas Johannes, Bargerbos, Arno, Grünhaupt, Lukas, Pita-Vidal, Marta, Wesdorp, Jaap Joachim, Liu, Yu, Kou, Angela, Andersen, Christian Kraglund, van Heck, Bernard
Publikováno v:
Phys. Rev. Applied 18, 024074 (2022)
We report the detection of a gate-tunable kinetic inductance in a hybrid InAs/Al nanowire. For this purpose, we have embedded the nanowire into a quarter-wave coplanar waveguide resonator and measured the resonance frequency of the circuit. We find t
Externí odkaz:
http://arxiv.org/abs/2202.08729
Autor:
Pikulin, Dmitry I., van Heck, Bernard, Karzig, Torsten, Martinez, Esteban A., Nijholt, Bas, Laeven, Tom, Winkler, Georg W., Watson, John D., Heedt, Sebastian, Temurhan, Mine, Svidenko, Vicky, Lutchyn, Roman M., Thomas, Mason, de Lange, Gijs, Casparis, Lucas, Nayak, Chetan
We develop a protocol to determine the presence and extent of a topological phase with Majorana zero modes in a hybrid superconductor-semiconductor device. The protocol is based on conductance measurements in a three-terminal device with two normal l
Externí odkaz:
http://arxiv.org/abs/2103.12217
Autor:
Kurilovich, Vladislav D., Murthy, Chaitanya, Kurilovich, Pavel D., van Heck, Bernard, Glazman, Leonid I., Nayak, Chetan
Publikováno v:
Phys. Rev. B 104, 014509 (2021)
We find the admittance $Y(\omega)$ of a Josephson junction at or near a topological transition. The dependence of the admittance on frequency and temperature at the critical point is universal and determined by the symmetries of the system. Despite t
Externí odkaz:
http://arxiv.org/abs/2102.05686
Publikováno v:
Phys. Rev. B 103, 014510 (2021)
We study the equilibrium dc Josephson current in a junction between an $s$-wave and a topological superconductor. Cooper pairs from the $s$-wave superconducting lead can transfer to the topological side either via an unpaired Majorana zero mode local
Externí odkaz:
http://arxiv.org/abs/2005.10657
Autor:
Sabonis, Deividas, Erlandsson, Oscar, Kringhøj, Anders, van Heck, Bernard, Larsen, Thorvald W., Petkovic, Ivana, Krogstrup, Peter, Petersson, Karl D., Marcus, Charles M.
Publikováno v:
Phys. Rev. Lett. 125, 156804 (2020)
A semiconductor transmon with an epitaxial Al shell fully surrounding an InAs nanowire core is investigated in the low $E_J/E_C$ regime. Little-Parks oscillations as a function of flux along the hybrid wire axis are destructive, creating lobes of ree
Externí odkaz:
http://arxiv.org/abs/2005.01748