Role of non-Markovianity and backflow of information in the speed of quantum evolution
We consider a two-level open quantum system undergoing pure dephasing, dissipative, or multiply decohering dynamics and show that whenever the dynamics is non-Markovian, the initial speed of evolution is a monotonic function of the relevant physical parameter driving the transition between the Marko...
| Main Authors: | , , |
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| Format: | Article |
| Published: |
American Physical Society
2017
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| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/44202/ |
| Summary: | We consider a two-level open quantum system undergoing pure dephasing, dissipative, or multiply decohering dynamics and show that whenever the dynamics is non-Markovian, the initial speed of evolution is a monotonic function of the relevant physical parameter driving the transition between the Markovian and non-Markovian behavior of the dynamics. In particular, within the considered models, a speed increase can only be observed in the presence of backflow of information from the environment to the system. |
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