Phase covariant channel: Quantum speed limit of evolution

Abstract

The quantum speed of evolution for the phase covariant map is investigated. In this context, we consider various combinations of (non)-Markovian, CP-(in)divisible, quantum channels and analyze how they affect the quantum speed limit time. The role of coherence-mixedness balance on the speed limit time is checked in the presence of both vacuum and finite temperature effects. We also investigate how the combination of (non)-Markovian channels decides the rate at which Holevo's information changes under different purity conditions.

Quantum speed limit for the creation and decay of quantum correlations

“…Similarly, in [4] QSL time for achieving a target fidelity for driven quantum systems has been derived. The fact that the impact of the bath on a quantum system is not always detrimental in nature has sped up the research work unraveling the characteristics of open quantum systems [5], and naturally the investigation of speed of evolution under non-unitary dynamics has become an active research topic [6][7][8][9][10]. Quantum speed limit for open quantum system based on different measures has been proposed [11][12][13].…”