Screening masses of photons interacting with a two-species fermionic system in relativistic BCS-BEC crossover

被引：1

作者：

Huang, Xun ^{[1
]}

Cai, Wei-Min ^{[1
]}

Guo, Hao ^{[1
]}

机构：

[1] Southeast Univ, Dept Phys, Jiulonghu Campus, Nanjing 211189, Jiangsu, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2017年 / 31卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Superfluid; Meissner mass; BCS-BEC crossover; SUPERCONDUCTIVITY; CONDENSATION; PAIRS;

D O I：

10.1142/S0217979217500783

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We address the behavior of Debye and Meissner masses of photons in a condensate of fermion pairs in the presence of number density asymmetry. Our formalism applies to a two-species fermionic system with number density asymmetry in BCS-Bose-Einstein condensation (BEC)relativistic BEC crossover and with variable rapidity. Our results recover the known results of the photon self-energy in the ultrarelativistic limit and the superfluid density in the nonrelativistic limit. We further consider the electromagnetic stability of the condensate and show that the Meissner mass squared can become negative in the weakly coupling BCS regime and the strongly coupling relativistic BEC regime. The electromagnetic instability is compared to the mechanical stability discussed in previous works.

引用

页数：16