Volume 132, Number 6, December 2020
|Number of page(s)||7|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||02 March 2021|
Accessing Kardar-Parisi-Zhang universality sub-classes with exciton polaritons(a)
1 Université Grenoble Alpes, CNRS, LPMMC - 38000 Grenoble, France
2 Dipartimento di Fisica, Università La Sapienza - 00185 Rome, Italy
3 Istituto Sistemi Complessi, Consiglio Nazionale delle Ricerche, Università La Sapienza - 00185 Rome, Italy
4 Institut Universitaire de France - 1 rue Descartes, 75000 Paris, France
Received: 14 October 2020
Accepted: 7 January 2021
Exciton-polariton condensates under driven-dissipative conditions are predicted to belong to the Kardar-Parisi-Zhang (KPZ) universality class, the dynamics of the condensate phase at long distance satisfying the same equation as for classical stochastic interface growth. We show that by engineering an external confinement for one-dimensional polaritons we can access two different universality sub-classes, which are associated to the flat or curved geometry for the interface. Our results for the condensate phase distribution and correlations match with great accuracy with the exact theoretical results for KPZ: the Tracy-Widom distributions (GOE and GUE) for the one-point statistics, and covariance of Airy processes (Airy1 and Airy2) for the two-point statistics. This study promotes the exciton-polariton system as a compelling platform to investigate KPZ universal properties.
PACS: 71.36.+c – Polaritons (including photon-phonon and photon-magnon interactions) / 64.60.Ht – Dynamic critical phenomena / 67.85.Jk – Other Bose-Einstein condensation phenomena
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