Signatures of a Nonthermal Metastable State in Copropagating Quantum Hall Edge Channels

A Tomonaga-Luttinger (TL) liquid is known as an integrable system, in which a nonequilibrium many-body state survives without relaxing to a thermalized state. This intriguing characteristic is tested experimentally in copropagating quantum Hall edge channels at bulk filling factor ν=2. The unidirect...

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Published inPhysical review letters Vol. 120; no. 19; p. 197701
Main Authors Itoh, Kosuke, Nakazawa, Ryo, Ota, Tomoaki, Hashisaka, Masayuki, Muraki, Koji, Fujisawa, Toshimasa
Format Journal Article
LanguageEnglish
Published United States 11.05.2018
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Summary:A Tomonaga-Luttinger (TL) liquid is known as an integrable system, in which a nonequilibrium many-body state survives without relaxing to a thermalized state. This intriguing characteristic is tested experimentally in copropagating quantum Hall edge channels at bulk filling factor ν=2. The unidirectional transport allows us to investigate the time evolution by measuring the spatial evolution of the electronic states. The initial state is prepared with a biased quantum point contact, and its spatial evolution is measured with a quantum-dot energy spectrometer. We find strong evidence for a nonthermal metastable state in agreement with the TL theory before the system relaxes to thermal equilibrium with coupling to the environment.
ISSN:1079-7114
DOI:10.1103/physrevlett.120.197701