Collective Excitations of a Strongly Correlated Nonequilibrium Photon Fluid across the Insulator-Superfluid Phase Transition

被引：2

作者：

Caleffi, Fabio ^{[1
]}

Capone, Massimo ^{[1
,2
]}

Carusotto, Iacopo ^{[3
,4
]}

机构：

[1] Int Sch Adv Studies SISSA, Via Bonomea 265, I-34136 Trieste, Italy

[2] CNR IOM Democritos, Via Bonomea 265, I-34136 Trieste, Italy

[3] Univ Trento, INO CNR BEC Ctr, Via Sommarive 14, I-38050 Trento, Italy

[4] Univ Trento, Dipartimento Fis, Via Sommarive 14, I-38123 Povo, Italy

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 131卷 / 19期

关键词：

INTERACTING PHOTONS; QUANTUM; POLARITONS; LOCALIZATION; SIGNATURES;

D O I：

10.1103/PhysRevLett.131.193604

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We develop a Gutzwiller theory for the nonequilibrium steady states of a strongly interacting photon fluid driven by a non-Markovian incoherent pump. In particular, we explore the collective modes of the system across the out-of-equilibrium insulator-superfluid transition of the system, characterizing the diffusive Goldstone mode in the superfluid phase and the excitation of particles and holes in the insulating one. Observable features in the pump-and-probe optical response of the system are highlighted. Our predictions are experimentally accessible to state-of-the-art circuit-QED devices and open the way for the study of novel driven-dissipative many-body scenarios with no counterparts at equilibrium.

引用

页数：7