Davydov-Ansatz for Landau-Zener-Stueckelberg-Majorana transitions in an environment: Tuning the survival probability via number state excitation

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Contributors

Abstract

We theoretically investigate transitions in a two-level system, which are induced by a sweep through an avoided crossing in the presence of coupling to a single, excited bosonic mode. This allows us to propose an initial number-state bosonic excitation as a new possible control parameter for the survival probability at long times. The expansion of number states in terms of coherent states centered around points on a circle in phase space makes a multi-Davydov-Ansatz the method of choice to perform the required numerical calculations. It is revealed that the starting time of the transition greatly affects the final transition probabilities. In addition, we found that the mixing angle, which is tuning between the diagonal and off-diagonal coupling, is decisive for the ability to control the transition via number state excitation. For a mixing angle of pi/4, we found the maximal effect of number state excitation on the transition probability.

Details

Original languageEnglish
Article number234109
Number of pages10
JournalJournal of Chemical Physics
Volume150
Issue number23
Publication statusPublished - 21 Jun 2019
Peer-reviewedYes

External IDs

Scopus 85067843319

Keywords

Keywords

  • QUANTUM, DYNAMICS