Galilean boosts and superfluidity of resonantly driven polariton fluids in the presence of an incoherent reservoir

Year: 2020

Authors: Amelio I., Minguzzi A., Richard M., Carusotto I.

Autors Affiliation: Univ Trento, INO CNR BEC Ctr & Dipartimento Fis, I-38123 Povo, Italy; Univ Grenoble Alpes, LPMMC, CNRS, F-38000 Grenoble, France; Univ Grenoble Alpes, Inst Neel, Grenoble INP, CNRS, F-38000 Grenoble, France.

Abstract: We theoretically investigate how the presence of a reservoir of incoherent excitations affects the superfluidity properties of resonantly driven polariton fluids. While in the absence of reservoir the two cases of a defect moving in a fluid at rest and of a fluid flowing against a static defect are linked by a formal Galilean transformation, where the reservoir defines a privileged reference frame attached to the semiconductor structure and causes markedly different features between the two settings. The consequences on the critical velocity for superfluidity are highlighted and compared to experiments in resonantly driven excitons polaritons.

Journal/Review: PHYSICAL REVIEW RESEARCH

Volume: 2 (2)      Pages from: 23158-1  to: 23158-13

More Information: We are grateful to M. Wouters for stimulating exchanges; I.A. thanks L. Giacomelli for continuous discussions on Bogoliubov formalism. We acknowledge financial support from the European Union FET-Open grant MIR-BOSE (Grant No. 737017), from the H2020-FETFLAG-2018-2020 project PhoQuS (Project No. 820392), and from the Provincia Autonoma di Trento. All numerical calculations were performed using the Julia Programming Language [39].
KeyWords: Drag
DOI: 10.1103/PhysRevResearch.2.023158

Citations: 10
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