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Liouvillian of the Open STIRAP Problem
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Number of Authors: 22018 (English)In: Entropy, ISSN 1099-4300, E-ISSN 1099-4300, Vol. 20, no 1, article id 20Article in journal (Refereed) Published
Abstract [en]

With the corresponding Liouvillian as a starting point, we demonstrate two seemingly new phenomena of the STIRAP problem when subjected to irreversible losses. It is argued that both of these can be understood from an underlying Zeno effect, and in particular both can be viewed as if the environment assists the STIRAP population transfer. The first of these is found for relative strong dephasing, and, in the language of the Liouvillian, it is explained from the explicit form of the matrix generating the time-evolution; the coherence terms of the state decay off, which prohibits further population transfer. For pure dissipation, another Zeno effect is found, where the presence of a non-zero Liouvillian gap protects the system's (adiabatic) state from non-adiabatic excitations. In contrast to full Zeno freezing of the evolution, which is often found in many problems without explicit time-dependence, here, the freezing takes place in the adiabatic basis such that the system still evolves but adiabatically.

Place, publisher, year, edition, pages
2018. Vol. 20, no 1, article id 20
Keywords [en]
STIRAP, Lindblad equation, quantum coherent control, exceptional points
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-153858DOI: 10.3390/e20010020ISI: 000424876200020OAI: oai:DiVA.org:su-153858DiVA, id: diva2:1188751
Available from: 2018-03-08 Created: 2018-03-08 Last updated: 2018-03-08Bibliographically approved

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