Steady-state properties of a nonequilibrium Fermi gas

Steady-state properties of a nonequilibrium Fermi gas The current-carrying steady state that arises in the middle of a metallic wire connected to macroscopic leads is characterized regarding its response functions, correlations, and entanglement entropy. The spectral function and the dynamical structure factor show clear nonequilibrium signatures accessible by state-of-the-art techniques. In contrast with the equilibrium case, the entanglement entropy is extensive with logarithmic corrections at zero temperature that depend on the lead-wire coupling and, in a nonanalytic way, on voltage. This shows that some robust universal quantities found in gapless equilibrium phases do not persist away from equilibrium. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Steady-state properties of a nonequilibrium Fermi gas

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Steady-state properties of a nonequilibrium Fermi gas

Abstract

The current-carrying steady state that arises in the middle of a metallic wire connected to macroscopic leads is characterized regarding its response functions, correlations, and entanglement entropy. The spectral function and the dynamical structure factor show clear nonequilibrium signatures accessible by state-of-the-art techniques. In contrast with the equilibrium case, the entanglement entropy is extensive with logarithmic corrections at zero temperature that depend on the lead-wire coupling and, in a nonanalytic way, on voltage. This shows that some robust universal quantities found in gapless equilibrium phases do not persist away from equilibrium.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
1098-0121
eISSN
1550-235X
D.O.I.
10.1103/PhysRevB.96.054302
Publisher site
See Article on Publisher Site

Abstract

The current-carrying steady state that arises in the middle of a metallic wire connected to macroscopic leads is characterized regarding its response functions, correlations, and entanglement entropy. The spectral function and the dynamical structure factor show clear nonequilibrium signatures accessible by state-of-the-art techniques. In contrast with the equilibrium case, the entanglement entropy is extensive with logarithmic corrections at zero temperature that depend on the lead-wire coupling and, in a nonanalytic way, on voltage. This shows that some robust universal quantities found in gapless equilibrium phases do not persist away from equilibrium.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Aug 2, 2017

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