Abstract：
:In this paper, we investigate the relationship between the quantum speedup, non-Markovianity and formation of a system-environment bound state. Previous results show a monotonic relation between these three such that providing bound states with more negative energy can lead to a higher degree of non-Markovianity, and hence to a greater speed of quantum evolution. By studying dynamics of a dissipative two-level system or a V-type three-level system, when similar and additional systems are present, we reveal that the quantum speedup is exclusively related to the formation of the system-environment bound state, while the non-Markovian effect of the system dynamics is neither necessary nor sufficient to speed up the quantum evolution. On the other hand, it is shown that only the formation of the system-environment bound state plays a decisive role in the acceleration of the quantum evolution.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Ahansaz B,Ektesabi Adoi
10.1038/s41598-019-51290-xsubject
Has Abstractpub_date
2019-10-18 00:00:00pages
14946issue
1issn
2045-2322pii
10.1038/s41598-019-51290-xjournal_volume
9pub_type
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