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Liouvillian of the Open STIRAP Problem
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum.
Rekke forfattare: 22018 (engelsk)Inngår i: Entropy, ISSN 1099-4300, E-ISSN 1099-4300, Vol. 20, nr 1, artikkel-id 20Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2018. Vol. 20, nr 1, artikkel-id 20
Emneord [en]
STIRAP, Lindblad equation, quantum coherent control, exceptional points
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-153858DOI: 10.3390/e20010020ISI: 000424876200020OAI: oai:DiVA.org:su-153858DiVA, id: diva2:1188751
Tilgjengelig fra: 2018-03-08 Laget: 2018-03-08 Sist oppdatert: 2018-03-08bibliografisk kontrollert

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