Interaction-Enhanced Superradiance of a Rydberg-Atom Array

被引：0

作者：

Han, Yiwen ^{[1
]}

Li, Haowei ^{[1
]}

Yi, Wei ^{[1
,2
,3
,4
,5
]}

机构：

[1] Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230026, Peoples R China

[2] Univ Sci & Technol China, Anhui Prov Key Lab Quantum Network, Hefei 230026, Peoples R China

[3] CAS Ctr Excellence Quantum Informat & Quantum Phys, Hefei 230026, Peoples R China

[4] Univ Sci & Technol China, Hefei Natl Lab, Hefei 230088, Peoples R China

[5] Univ Sci & Technol China, Anhui Ctr Fundamental Sci Theoret Phys, Hefei 230026, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 133卷 / 24期

基金：

中国国家自然科学基金;

关键词：

QUANTUM PHASE-TRANSITION; DICKE-MODEL;

D O I：

10.1103/PhysRevLett.133.243401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the superradiant phase transition of an array of Rydberg atoms in a dissipative microwave cavity. Under the interplay of the cavity field and the long-range Rydberg interaction, the steady state of the system exhibits an interaction-enhanced superradiance, with vanishing critical atom-cavity coupling rates at a discrete set of interaction strengths. We find that, while the phenomenon can be analytically understood in the case of a constant all-to-all interaction, the enhanced superradiance persists under typical experimental parameters with spatially dependent interactions, but at modified critical interaction strengths. The diverging susceptibility at these critical points is captured by emergent quantum Rabi models, each of which comprises a pair of collective atomic states with different numbers of atomic excitations. These collective states become degenerate at the critical interaction strengths, resulting in a superradiant phase for an arbitrarily small atom-cavity coupling.

引用

页数：6