637 citations · 2.5k across the 41 of their papers we have counts for
42 papers
Phonon spectral density in a GaAs/AlGaAs double quantum dot
Andrea Hofmann, Christian Karlewski, Andreas Heimes +6
We study phonon emission in a GaAs/AlGaAs double quantum dot by monitoring the tunneling of a single electron between the two dots. We prepare the system such that a known amount o…
Electron-assisted magnetization tunneling in single spin systems
Timofey Balashov, Christian Karlewski, Tobias Märkl +2
Magnetic excitations of single atoms on surfaces have been widely studied experimentally in the past decade. Lately, systems with unprecedented magnetic stability started to emerge…
Emulating Majorana fermions and their braiding by Ising spin chains
Stefan Backens, Alexander Shnirman, Yuriy Makhlin +3
We analyse the control of Majorana zero-energy states by mapping the fermionic system onto a chain of Ising spins. Although the topological protection is lost for the Ising system,…
Electronic Decoherence of Two-Level Systems in a Josephson Junction
Alexander Bilmes, Sebastian Zanker, Andreas Heimes +5
The sensitivity of superconducting qubits allows for spectroscopy and coherence measurements on individual two-level systems present in the disordered tunnel barrier of an $\mathrm…
Emulating the one-dimensional Fermi-Hubbard model by a double chain of qubits
Jan-Michael Reiner, Michael Marthaler, Jochen Braumüller +2
The Jordan-Wigner transformation maps a one-dimensional spin-1/2 system onto a fermionic model without spin degree of freedom. A double chain of quantum bits with XX and ZZ couplin…
Decoherence and Decay of Two-level Systems due to Non-equilibrium Quasiparticles
Sebastian Zanker, Michael Marthaler, Gerd Schön
It is frequently observed that even at very low temperatures the number of quasiparticles in superconducting materials is higher than predicted by standard BCS-theory. These quasip…