62 citations · 173 across the 5 of their papers we have counts for
5 papers
System-environment correlations and Non-Markovian dynamics
Ansgar Pernice, Julius Helm, Walter T. Strunz
We determine the total state dynamics of a dephasing open quantum system using the standard environment of harmonic oscillators. Of particular interest are random unitary approache…
Environment-Assisted Error Correction of Single-Qubit Phase Damping
Benjamin Trendelkamp-Schroer, Julius Helm, Walter T. Strunz
Open quantum system dynamics of random unitary type may in principle be fully undone. Closely following the scheme of environment-assisted error correction proposed by Gregoratti a…
Characterization of Decoherence from an Environmental Perspective
Julius Helm, Walter T. Strunz, Stephan Rietzler +1
For the case of phase damping (pure decoherence) we investigate the extent to which environmental traits are imprinted on an open quantum system. The dynamics is described using th…
Decoherence and Entanglement Dynamics in Fluctuating Fields
Julius Helm, Walter T. Strunz
We study pure phase damping of two qubits due to fluctuating fields. As frequently employed, decoherence is thus described in terms of random unitary (RU) dynamics, i.e., a convex…
Quantum Decoherence of Two Qubits
Julius Helm, Walter T. Strunz
It is commonly stated that decoherence in open quantum systems is due to growing entanglement with an environment. In practice, however, surprisingly often decoherence may equally…