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

Werther, M., Grossmann, F., Huang, Z., & Zhao, Y. (2019). Davydov-Ansatz for Landau-Zener-Stueckelberg-Majorana transitions in an environment: Tuning the survival probability via number state excitation. The Journal of Chemical Physics, 150(23): 234109. doi:10.1063/1.5096158.

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 Creators:
Werther, Michael1, Author           
Grossmann, Frank2, Author
Huang, Zhongkai2, Author
Zhao, Yang2, Author
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              
2external, ou_persistent22              

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 MPIPKS: Stochastic processes
 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.

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 Dates: 2019-06-192019-06-21
 Publication Status: Issued
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 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000472600300014
DOI: 10.1063/1.5096158
 Degree: -

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Title: The Journal of Chemical Physics
  Other : J. Chem. Phys.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Institute of Physics
Pages: - Volume / Issue: 150 (23) Sequence Number: 234109 Start / End Page: - Identifier: ISSN: 0021-9606
CoNE: https://pure.mpg.de/cone/journals/resource/954922836226