Scientific Results

Multicomponent polariton superfluidity in the optical parametric oscillator regime

Year: 2015

Authors: Berceanu A. C., Dominici L., Carusotto I., Ballarini D., Cancellieri E., Gigli G., Szymanska MH., Sanvitto D., Marchetti FM.

Autors Affiliation: Univ Autonoma Madrid, Dept Fis Teor Mat Condensada, E-28049 Madrid, Spain; Univ Autonoma Madrid, Condensed Matter Phys Ctr IFIMAC, E-28049 Madrid, Spain; CNR NANOTEC, Ist Nanotecnol, I-73100 Lecce, Italy;‎ IIT, I-73010 Lecce, Italy;‎ INO CNR BEC Ctr, I-38123 Povo, Italy;‎ Univ Trento, I-38123 Povo, Italy;‎ Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England; UCL, Dept Phys & Astron, London WC1E 6BT, England

Abstract: Superfluidity, which is the ability of a liquid or gas to flow with zero viscosity, is one of the most remarkable implications of collective quantum coherence. In equilibrium systems such as liquid He-4 and ultracold atomic gases, superfluid behavior conjugates diverse yet related phenomena, such as a persistent metastable flow in multiply connected geometries and the existence of a critical velocity for frictionless flow when hitting a static defect. The link between these different aspects of superfluid behavior is far less clear in driven-dissipative systems displaying collective coherence, such as microcavity polaritons, which raises important questions about their concurrency. With a joint theoretical and experimental study, we show that the scenario is particularly rich for polaritons driven in a three-fluid collective coherent regime, i.e., a so-called optical parametric oscillator. On the one hand, the spontaneous macroscopic coherence following the phase locking of the signal and idler fluids has been shown to be responsible for their simultaneous quantized flow metastability. On the other hand, we show here that the pump, signal, and idler have distinct responses when hitting a static defect; while the signal displays modulations that are barely perceptible, the ones appearing in the pump and idler are determined by their mutual coupling due to nonlinear and parametric processes.

Journal/Review: PHYSICAL REVIEW B

Volume: 92 (3)      Pages from: 035307-1  to: 035307-7

KeyWords: SEMICONDUCTOR MICROCAVITIES; CONDENSATE; AMPLIFIER
DOI: 10.1103/PhysRevB.92.035307

Citations: 8
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-17
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