124 citations · 187 across the 3 of their papers we have counts for
3 papers
quant-ph2008★ 27 cited
Adiabatic preparation without Quantum Phase Transitions
Gernot Schaller
Many physically interesting models show a quantum phase transition when a single parameter is varied through a critical point, where the ground state and the first excited state be…
quant-ph2008★ 124 cited
Preservation of Positivity by Dynamical Coarse-Graining
Gernot Schaller, Tobias Brandes
We compare different quantum Master equations for the time evolution of the reduced density matrix. The widely applied secular approximation (rotating wave approximation) applied i…
quant-ph2007★ 36 cited
Decoherence in the dynamical quantum phase transition of the transverse Ising chain
Sarah Mostame, Gernot Schaller, Ralf Schützhold
For the prototypical example of the Ising chain in a transverse field, we study the impact of decoherence on the sweep through a second-order quantum phase transition. Apart from t…