Universität zu Köln

Froeml, Heinrich, Muckel, Christopher, Kollath, Corinna, Chiocchetta, Alessio and Diehl, Sebastian (2020). Ultracold quantum wires with localized losses: Many-body quantum Zeno effect. Phys. Rev. B, 101 (14). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We study a one-dimensional system of interacting spinless fermions subject to a localized loss, where the interplay of gapless quantum fluctuations and particle interactions leads to an incarnation of the quantum Zeno effect of genuine many-body nature. This model constitutes a nonequilibrium counterpart of the paradigmatic Kane-Fisher potential barrier problem, and it exhibits strong interaction effects due to the gapless nature of the system. As a central result, we show that the loss probability is strongly renormalized near the Fermi momentum as a realization of the quantum Zeno effect, resulting in a suppression of the emission of particles at the Fermi level. This is reflected in the structure of the particle momentum distribution, exhibiting a peak close to the Fermi momentum. We substantiate these findings by three complementary approaches: a real-space renormalization group of a general microscopic continuum model, a dynamical Hartree-Fock numerical analysis of a microscopic model on a lattice, and a renormalization group analysis based on an effective Luttinger liquid description incorporating mode-coupling effects.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Froeml, Heinrich UNSPECIFIED UNSPECIFIED UNSPECIFIED Muckel, Christopher UNSPECIFIED UNSPECIFIED UNSPECIFIED Kollath, Corinna UNSPECIFIED UNSPECIFIED UNSPECIFIED Chiocchetta, Alessio UNSPECIFIED UNSPECIFIED UNSPECIFIED Diehl, Sebastian UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-339424
DOI:	10.1103/PhysRevB.101.144301
Journal or Publication Title:	Phys. Rev. B
Volume:	101
Number:	14
Date:	2020
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute for Theoretical Physics
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SPIN Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/33942