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

Magnus O. Borgh, Guido Franchetti, Jonathan Keeling, Natalia G. Berloff

Результат исследований: Вклад в журналСтатьярецензирование

22 Цитирования (Scopus)

Аннотация

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.

Язык оригиналаАнглийский
Номер статьи035307
ЖурналPhysical Review B - Condensed Matter and Materials Physics
Том86
Номер выпуска3
DOI
СостояниеОпубликовано - 9 июл. 2012
Опубликовано для внешнего пользованияДа

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