Fluctuation-Induced Quantum Zeno Effect

Heinrich Fröml, Alessio Chiocchetta, Corinna Kollath, and Sebastian Diehl
Phys. Rev. Lett. 122, 040402 – Published 1 February 2019
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Abstract

An isolated quantum gas with a localized loss features a nonmonotonic behavior of the particle loss rate as an incarnation of the quantum Zeno effect, as recently shown in experiments with cold atomic gases. While this effect can be understood in terms of local, microscopic physics, we show that novel many-body effects emerge when nonlinear gapless quantum fluctuations become important. To this end, we investigate the effect of a local dissipative impurity on a one-dimensional gas of interacting fermions. We show that the escape probability for modes close to the Fermi energy vanishes for an arbitrary strength of the dissipation. In addition, transport properties across the impurity are qualitatively modified, similarly to the Kane-Fisher barrier problem. We substantiate these findings using both a microscopic model of spinless fermions and a Luttinger liquid description.

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  • Received 24 September 2018

DOI:https://doi.org/10.1103/PhysRevLett.122.040402

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalStatistical Physics & ThermodynamicsCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Heinrich Fröml1, Alessio Chiocchetta1, Corinna Kollath2, and Sebastian Diehl1,3

  • 1Institute for Theoretical Physics, University of Cologne, D-50937 Cologne, Germany
  • 2HISKP, University of Bonn, 53115 Bonn, Germany
  • 3Kavli Institute for Theoretical Physics, University of California, Santa Barbara, California 93106, USA

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Issue

Vol. 122, Iss. 4 — 1 February 2019

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