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Pancharatnam–Berry phase in condensate of indirect excitons

Author

Listed:
  • J. R. Leonard

    (University of California at San Diego)

  • A. A. High

    (University of California at San Diego)

  • A. T. Hammack

    (University of California at San Diego)

  • M. M. Fogler

    (University of California at San Diego)

  • L. V. Butov

    (University of California at San Diego)

  • K. L. Campman

    (University of California at Santa Barbara)

  • A. C. Gossard

    (University of California at Santa Barbara)

Abstract

The Pancharatnam–Berry phase is a geometric phase acquired over a cycle of parameters in the Hamiltonian governing the evolution of the system. Here, we report on the observation of the Pancharatnam–Berry phase in a condensate of indirect excitons (IXs) in a GaAs-coupled quantum well structure. The Pancharatnam–Berry phase is directly measured by detecting phase shifts of interference fringes in IX interference patterns. Correlations are found between the phase shifts, polarization pattern of IX emission, and onset of IX spontaneous coherence. The evolving Pancharatnam–Berry phase is acquired due to coherent spin precession in IX condensate and is observed with no decay over lengths exceeding 10 μm indicating long-range coherent spin transport.

Suggested Citation

  • J. R. Leonard & A. A. High & A. T. Hammack & M. M. Fogler & L. V. Butov & K. L. Campman & A. C. Gossard, 2018. "Pancharatnam–Berry phase in condensate of indirect excitons," Nature Communications, Nature, vol. 9(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04667-x
    DOI: 10.1038/s41467-018-04667-x
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    Cited by:

    1. Zhiwen Zhou & E. A. Szwed & D. J. Choksy & L. H. Fowler-Gerace & L. V. Butov, 2024. "Long-distance decay-less spin transport in indirect excitons in a van der Waals heterostructure," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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