Quantum dynamical speedup for correlated initial states
Alireza Gholizadeh, Maryam Hadipour, Soroush Haseli, Saeed Haddadi,, and Hazhir Dolatkhah
TL;DR
This paper investigates how initial correlations and non-Markovian effects influence the quantum speed limit, revealing that quantum coherence in correlated states can accelerate quantum evolution.
Contribution
It provides a detailed analysis of the impact of initial system-environment correlations on quantum speed limits, highlighting the role of non-Markovianity and coherence.
Findings
Non-Markovianity causes quantum speedup.
Quantum coherence in initial states affects evolution speed.
Correlated initial states can accelerate quantum dynamics.
Abstract
The maximal evolution speed of any quantum system can be expressed by the quantum speed limit time. In this paper, we consider a model in which the system has a correlation with the environment. The influence of the initial correlation between the system and environment on the quantum speed limit is investigated. It is shown that the appearance of non-Markovianity effects causes the speedup of quantum evolution. Moreover, we demonstrate the dependence of quantum dynamical speedup on the quantum coherence of the correlated initial state.
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Taxonomy
TopicsQuantum Information and Cryptography · Spectroscopy and Quantum Chemical Studies · Quantum Computing Algorithms and Architecture