Abstract

Topological defects such as quantized vortices are one of the most striking manifestations of the superfluid nature of Bose-Einstein condensates and typical examples of quantum mechanical phenomena on a macroscopic scale. Here we demonstrate the formation of a lattice of vortex-antivortex pairs and study its properties in the nonlinear regime at high polariton-density where polariton-polariton interactions dominate the behavior of the system. In this work first we demonstrate that the array of vortex-antivortex pairs can be generated in a controllable way in terms of size of the array and in terms of size and shape of its fundamental unit cell. Then we demonstrate that polariton-polariton repulsion can strongly deform the lattice unit cell and determine the pattern distribution of the vortex-antivortex pairs, reaching a completely new behavior with respect to geometrically generated vortex lattices whose shape is determined only by the geometry of the system. © 2014 American Physical Society.

Autore Pugliese

• Sanvitto Daniele , Ballarini Dario

Tutti gli autori

• Hivet R.; Cancellieri E.; Boulier T.; Ballarini D.; Sanvitto D.; Marchetti F.M.; Szymanska M.H.; Ciuti C.; Giacobino E.; Bramati A.

Titolo volume/Rivista

Physical review. B, Condensed matter and materials physics

Anno di pubblicazione

2014

ISSN

1098-0121

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Settori ERC

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Codici ASJC

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