Gapless and gapped holographic phonons

被引：36

作者：

Amoretti, Andrea ^{[1
,2
,3
,4
]}

Arean, Daniel ^{[5
,6
]}

Gouteraux, Blaise ^{[6
]}

Musso, Daniele ^{[7
]}

机构：

[1] Univ Genoa, Dipartimento Fis, Via Dodecaneso 33, I-16146 Genoa, Italy

[2] Ist Nazl Fis Nucl, Sez Genova, Via Dodecaneso 33, I-16146 Genoa, Italy

[3] Univ Libre Bruxelles, Phys Theor & Math Inst, CP 231, B-1050 Brussels, Belgium

[4] Univ Libre Bruxelles, Int Solvay Inst, CP 231, B-1050 Brussels, Belgium

[5] UAM, CSIC, Inst Fis Teor, Calle Nicolas Cabrera 13-15, Madrid 28049, Spain

[6] Ecole Polytech, IP Paris, CNRS, CPHT, Route Saclay, F-91128 Palaiseau, France

[7] Univ Santiago de Compostela, Rua Xoaquin Diaz de Rabago,Campus Vida, Santiago De Compostela 15705, A Coruna, Spain

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2020年 / 2020卷 / 01期

基金：

欧洲研究理事会;

关键词：

Effective Field Theories; Holography and condensed matter physics (AdS; CMT); Space-Time Symmetries; Spontaneous Symmetry Breaking;

D O I：

10.1007/JHEP01(2020)058

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We study a holographic model where translations are both spontaneously and explicitly broken, leading to the presence of (pseudo)-phonons in the spectrum. The weak explicit breaking is due to two independent mechanisms: a small source for the condensate itself and additional linearly space-dependent marginal operators. The low energy dynamics of the model is described by Wigner crystal hydrodynamics. In absence of a source for the condensate, the phonons remain gapless, but momentum is relaxed. Turning on a source for the condensate damps and pins the phonons. Finally, we verify that the universal relation between the phonon damping rate, mass and diffusivity reported in [1] continues to hold in this model for weak enough explicit breaking.

引用

页数：22

共 60 条

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