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- Title
Relationship between quantum speed limit time and memory time in a photonic-band-gap environment.
- Authors
Wang, J.; Wu, Y. N.; Mo, M. L.; Zhang, H. Z.
- Abstract
Non-Markovian effect is found to be able to decrease the quantum speed limit (QSL) time, and hence to enhance the intrinsic speed of quantum evolution. Although a reservoir with larger degree of non-Markovianity may seem like it should cause smaller QSL times, this seemingly intuitive thinking may not always be true. We illustrate this by investigating the QSL time of a qubit that is coupled to a two-band photonic-band-gap (PBG) environment. We show how the QSL time is influenced by the coherent property of the reservoir and the band-gap width. In particular, we find that the decrease of the QSL time is not attributed to the increasing non-Markovianity, while the memory time of the environment can be seen as an essential reflection to the QSL time. So, the QSL time provides a further insight and sharper identification of memory time in a PBG environment. We also discuss a feasible experimental realization of our prediction.
- Publication
Scientific Reports, 2016, p39110
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep39110