Work

Superradiant phase transitions and spontaneous superradiant photon current in a double-cavity system

Year: 2025

Type: article

Abstract: As a crucial role in various aspects of quantum transport, quantum pumping usually refers to the controlled movement of particles through external manipulation. This work reports a unique occurrence of self-organized quantum pumping for photons without any external driving in a spin–cavity system, where an assemble of quantum emitters interact with photonic modes confined in two tunneling-coupled cavities. Specifically, undermirror-symmetry breaking of cavity dissipations and spin–cavity coupling strengths, a steady photon current spontaneously emerges between the two cavities when the system reaches its superradiant phase. Investigation shows that cavity dissipation, which acts as a pump, assists the system to sustainably extract photons from the surroundings and generate a superradiant photon current with photon loss via dissipation channels. Generating with Z 2 spontaneous symmetry breaking, this kind of counter-intuitive photon current provides a spontaneous regime for the occurrence of current in real space.

Source: New Journal of Physics

DOI: 10.1088/1367-2630/ae17e6

Authors: Lei Qiao, Ya-Ju Song, P Z Zhao

Institutions: Beihang University, Hengyang Normal University, Shandong University

Language: English

Topic: Strong Light-Matter Interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,610

Funder: National Natural Science Foundation of China