Non-linear quantum critical dynamics and fluctuation-dissipation ratios far from equilibrium

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:400

Article; Proceedings Paper

Zamani, Farzaneh^1,2  Ribeiro, Pedro^3,4  Kirchner, Stefan⁵ 

[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[2] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[3] Univ Lisbon, Inst Super Tcn, CeFEMA, P-1049001 Lisbon, Portugal

[4] Russian Quantum Ctr, Skolkovo 143025, Moscow Area, Russia

[5] Zhejiang Univ, Ctr Correlated Matter, Hangzhou 310058, Zhejiang, Peoples R China

关键词: Quantum criticality;    Critical Kondo destruction;    Non-thermal steady states;    Non-linear dissipative dynamics;    Effective temperatures;   

DOI  :  10.1016/j.jmmm.2015.07.106

来源: Elsevier

【 摘 要 】

Non-thermal correlations of strongly correlated electron systems and the far-from-equilibrium properties of phases of condensed matter have become a topical research area. Here, an overview of the nonlinear dynamics found near continuous zero-temperature phase transitions within the context of effective temperatures is presented. In particular, we focus on models of critical Kondo destruction. Such a quantum critical state, where Kondo screening is destroyed in a critical fashion, is realized in a number of rare earth intermetallics. This raises the possibility of experimentally testing for the existence of fluctuation-dissipation relations far from equilibrium in terms of effective temperatures. Finally, we present an analysis of a non-interacting, critical reference system, the pseudogap resonant level model, in terms of effective temperatures and contrast these results with those obtained near interacting quantum critical points. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free