https://doi.org/10.1140/epjp/s13360-024-05498-0
Regular Article
Quantum speed limit time and purity of open two-level atom without rotating wave approximation
COMSATS University Islamabad, Park Road, Tarlai Kalan, 45550, Islamabad, Pakistan
Received:
23
March
2023
Accepted:
26
July
2024
Published online:
10
August
2024
The effects of frequent measurements on purity of states and quantum speed limit (QSL) time of a two-level atom interacting with electromagnetic field without rotating wave approximation (RWA) are studied. The dynamics of QSL time for 
and 
transitions of hydrogen atom reveal controlled switching from quantum Zeno effect (QZE) to quantum anti-Zeno effect (QAZE), however, in different order of increasing measurement intervals. Our results show that transition might be advantageous for certain tasks in quantum information processing.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
