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  Floquet dynamical quantum phase transitions under synchronized periodic driving

Jafari, R., Akbari, A., Mishra, U., & Johannesson, H. (2022). Floquet dynamical quantum phase transitions under synchronized periodic driving. Physical Review B, 105(9): 094311, pp. 1-13. doi:10.1103/PhysRevB.105.094311.

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Jafari, R.1, Author
Akbari, Alireza2, Author              
Mishra, Utkarsh1, Author
Johannesson, Henrik1, Author
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1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              

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 Abstract: We study a generic class of fermionic two-band models under synchronized periodic driving, i.e., with the different terms in a Hamiltonian subject to periodic drives with the same frequency and phase. With all modes initially in a maximally mixed state, the synchronized drive is found to produce nonperiodic patterns of dynamical quantum phase transitions, with their appearance determined by an interplay of the band structure and the frequency of the drive. A case study of the anisotropic XY chain in a transverse magnetic field, transcribed to an effective two-band model, shows that the modes come with quantized geometric phases, allowing for the construction of an effective dynamical order parameter. Numerical studies in the limit of a strong magnetic field reveal distinct signals of precursors of dynamical quantum phase transitions also when the initial state of the XY chain is perturbed slightly away from maximal mixing, suggesting that the transitions may be accessible experimentally. A blueprint for an experiment built around laser-trapped circular Rydberg atoms is proposed.

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Language(s): eng - English
 Dates: 2022-03-282022-03-28
 Publication Status: Published in print
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 105 (9) Sequence Number: 094311 Start / End Page: 1 - 13 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008