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Pancharatnam-Berry phase in condensate of indirect excitons.

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??m indicating long-range coherent spin transport.

SUBMITTER: Leonard JR

PROVIDER: S-EPMC5986757 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature

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Pancharatnam-Berry phase in condensate of indirect excitons.

Leonard J R JR High A A AA Hammack A T AT Fogler M M MM Butov L V LV Campman K L KL Gossard A C AC

Nature communications 20180604 1

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 ...[more]

PMID: 29867086

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