Quantized conductance at the Majorana phase transition in a disordered superconducting wire.
- A. Akhmerov, J. Dahlhaus, F. Hassler, M. Wimmer, C. Beenakker
- PhysicsPhysical Review Letters
- 28 September 2010
It is shown that the phase transition itself is signaled by a quantized thermal conductance and electrical shot noise power, irrespective of the degree of disorder, in a ring geometry.
Dynamical detection of Majorana fermions in current-biased nanowires
- Fernando Dom'inguez, F. Hassler, G. Platero
- Physics
- 3 February 2012
We analyze the current-biased Shapiro experiment in a Josephson junction formed by two one-dimensional nanowires featuring Majorana fermions. Ideally, these junctions are predicted to have an…
Dual approach to circuit quantization using loop charges
- J. Ulrich, F. Hassler
- Physics
- 9 May 2016
The conventional approach to circuit quantization is based on node fluxes and traces the motion of node charges on the islands of the circuit. However, for some devices, the relevant physics can be…
Exact rotating wave approximation
- Daniel Zeuch, F. Hassler, J. Slim, D. DiVincenzo
- PhysicsAnnals of Physics
- 8 July 2018
Coulomb-assisted braiding of Majorana fermions in a Josephson junction array
- B. V. Heck, A. Akhmerov, F. Hassler, M.Burrello, C. Beenakker
- Physics
- 25 November 2011
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 fermions are…
The top-transmon: a hybrid superconducting qubit for parity-protected quantum computation
- F. Hassler, A. Akhmerov, C. Beenakker
- Physics
- 2 May 2011
Qubits constructed from uncoupled Majorana fermions are protected from decoherence, but to perform a quantum computation this topological protection needs to be broken. Parity-protected quantum…
Scattering theory of topological insulators and superconductors
- I. C. Fulga, F. Hassler, A. Akhmerov
- Physics
- 30 June 2011
The topological invariant of a topological insulator (or superconductor) is given by the number of symmetry-protected edge states present at the Fermi level. Despite this fact, established…
Scattering formula for the topological quantum number of a disordered multimode wire
- I. C. Fulga, F. Hassler, A. Akhmerov, C. Beenakker
- Physics
- 10 January 2011
The topological quantum number Q of a superconducting or chiral insulating wire counts the number of stable bound states at the end points. We determine Q from the matrix r of reflection amplitudes…
Strongly interacting Majorana modes in an array of Josephson junctions
- F. Hassler, D. Schuricht
- Physics
- 11 June 2012
An array of superconducting islands with semiconducting nanowires in the right regime provides a macroscopic implementation of Kitaev's toy model for Majorana wires. We show that a capacitive…
Broadband Lamb shift in an engineered quantum system
- M. Silveri, S. Masuda, M. Möttönen
- PhysicsNature Physics
- 4 September 2018
The shift of the energy levels of a quantum system owing to broadband electromagnetic vacuum fluctuations—the Lamb shift—has been central for the development of quantum electrodynamics and for the…
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