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arXiv · 1804.02523

Signatures of a non-thermal metastable state in copropagating quantum Hall edge channels

Kosuke Itoh·Ryo Nakazawa·Tomoaki Ota·Masayuki Hashisaka·Koji Muraki·Toshimasa Fujisawa
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Abstract

A Tomonaga-Luttinger (TL) liquid is known as an integrable system, in which a non-equilibrium 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 nu = 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 evidences for a non-thermal metastable state in agreement with the TL theory before the system relaxes to thermal equilibrium with coupling to the environment.

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Kosuke Itoh, Ryo Nakazawa, Tomoaki Ota, Masayuki Hashisaka, Koji Muraki, Toshimasa Fujisawa. 2018-04-07. Signatures of a non-thermal metastable state in copropagating quantum Hall edge channels. https://arxiv.org/abs/1804.02523

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