Robustness and observability of rotating vortex lattices in an exciton-polariton condensate

Borgh, Magnus O., Franchetti, Guido, Keeling, Jonathan and Berloff, Natalia G. (2012) Robustness and observability of rotating vortex lattices in an exciton-polariton condensate. Physical Review B, 86 (3). ISSN 1098-0121

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Abstract

Exciton-polariton condensates display a variety of intriguing pattern-forming behaviors, particularly when confined in potential traps. It has previously been predicted that triangular lattices of vortices of the same sign will form spontaneously as the result of surface instabilities in a harmonic trap. However, natural disorder, deviation of the external potential from circular symmetry, or higher-order terms modifying the dynamical equations may all have detrimental effects and destabilize the circular trajectories of vortices. Here we address these issues by characterizing the robustness of the vortex lattice against disorder and deformations of the trapping potential. Since most experiments use time-integrated measurements, it would be hard to observe directly the rotating vortex lattices or distinguish them from vortex-free states. We suggest how these difficulties can be overcome and present an experimentally viable interference-imaging scheme that would allow the detection of rotating vortex lattices.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Related URLs:
Depositing User: Pure Connector
Date Deposited: 13 Oct 2016 10:00
Last Modified: 25 Jul 2018 12:46
URI: https://ueaeprints.uea.ac.uk/id/eprint/60906
DOI: 10.1103/PhysRevB.86.035307

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