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quant-ph2005★ 57 cited
Dephasing representation of quantum fidelity for general pure and mixed states
Jiri Vanicek
General semiclassical expression for quantum fidelity (Loschmidt echo) of arbitrary pure and mixed states is derived. It expresses fidelity as an interference sum of dephasing traj…
quant-ph2004★ 1 cited
Dephasing representation: Unified semiclassical framework for fidelity decay
Jiri Vanicek
This paper presents a unified semiclassical framework for five regimes of quantum fidelity decay and conjectures a new universal regime. The theory is based solely on the statistic…