3 papers
quant-ph2017
Permanent spin currents in cavity-qubit systems
Manas Kulkarni, Sven M. Hein, Eliot Kapit +1
In a recent remarkable experiment [P. Roushan et al., Nature Physics 13, 146 (2017)], a spin current in an architecture of three superconducting qubits was produced during a few mi…
quant-ph2016
Purification and switching protocols for dissipatively stabilized entangled qubit states
Sven M. Hein, Camille Aron, Hakan E. Türeci
Pure dephasing processes limit the fidelities achievable in driven-dissipative schemes for stabilization of entangled states of qubits. We propose a scheme which, combined with alr…
quant-ph2016
Time-delayed quantum coherent Pyragas feedback control of photon squeezing in a degenerate parametric oscillator
Manuel Kraft, Sven Moritz Hein, Judith Lehnert +3
Quantum coherent feedback control is a measurement-free control method fully preserving quantum coherence. In this paper we show how time-delayed quantum coherent feedback can be u…