341 citations · 797 across the 11 of their papers we have counts for
10 papers · 1 filter
Decoherence of Majorana zero modes mediated by gapless fermions
Sauri Bhattacharyya, Marco Grilli, Bernard van Heck
We study the decoherence of a collection of Majorana zero modes weakly coupled to a gapless reservoir of non-interacting fermions. Using the Born-Markov approximation, we derive a…
Andreev spin qubit protected by Franck-Condon blockade
P. D. Kurilovich, T. Vakhtel, T. Connolly +2
Andreev levels localized in a weak link between two superconductors can trap a superconducting quasiparticle. If there is a spin-orbit coupling in the link, the spin of the quasipa…
Quantum-critical dynamics of a Josephson junction at the topological transition
Vladislav D. Kurilovich, Chaitanya Murthy, Pavel D. Kurilovich +3
We find the admittance of a Josephson junction at or near a topological transition. The dependence of the admittance on frequency and temperature at the critical point is un…
Full parity phase diagram of a proximitized nanowire island
J. Shen, G. W. Winkler, F. Borsoi +14
We measure the charge periodicity of Coulomb blockade conductance oscillations of a hybrid InSb-Al island as a function of gate voltage and parallel magnetic field. The periodicity…
Destructive Little-Parks Effect in a Full-Shell Nanowire-based Transmon
Deividas Sabonis, Oscar Erlandsson, Anders Kringhøj +6
A semiconductor transmon with an epitaxial Al shell fully surrounding an InAs nanowire core is investigated in the low regime. Little-Parks oscillations as a function of…
Josephson current via an isolated Majorana zero mode
Chun-Xiao Liu, Bernard van Heck, Michael Wimmer
We study the equilibrium dc Josephson current in a junction between an -wave and a topological superconductor. Cooper pairs from the -wave superconducting lead can transfer t…
Suppressed Charge Dispersion via Resonant Tunneling in a Single-Channel Transmon
A. Kringhøj, B. van Heck, T. W. Larsen +6
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 resonan…
Observation of vanishing charge dispersion of a nearly-open superconducting island
Arno Bargerbos, Willemijn Uilhoorn, Chung-Kai Yang +5
Isolation from the environment determines the extent to which charge is confined on an island, which manifests as Coulomb oscillations such as charge dispersion. We investigate the…
Realization of microwave quantum circuits using hybrid superconducting-semiconducting nanowire Josephson elements
G. de Lange, B. van Heck, A. Bruno +6
We report the realization of quantum microwave circuits using hybrid superconductor-semiconductor Josephson elements comprised of InAs nanowires contacted by NbTiN. Capacitively-sh…
Coulomb-assisted braiding of Majorana fermions in a Josephson junction array
B. van Heck, A. R. Akhmerov, F. Hassler +2
We show how to exchange (braid) Majorana fermions in a network of superconducting nanowires by control over Coulomb interactions rather than tunneling. Even though Majorana fermion…