Quantum Behavior of a Heavy Impurity Strongly Coupled to a Bose Gas

Jesper Levinsen, Luis A.Peña Ardila, Shuhei M. Yoshida, Meera M. Parish

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2 Citations (Scopus)

Abstract

We investigate the problem of an infinitely heavy impurity interacting with a dilute Bose gas at zero temperature. When the impurity-boson interactions are short-ranged, we show that boson-boson interactions induce a quantum blockade effect, where a single boson can effectively block or screen the impurity potential. Since this behavior depends on the quantum granular nature of the Bose gas, it cannot be captured within a standard classical-field description. Using a combination of exact quantum Monte Carlo methods and a truncated basis approach, we show how the quantum correlations between bosons lead to universal few-body bound states and a logarithmically slow dependence of the polaron ground-state energy on the boson-boson scattering length. Moreover, we expose the link between the polaron energy and the spatial structure of the quantum correlations, spanning the infrared to ultraviolet physics.

Original languageEnglish
Article number033401
Number of pages6
JournalPhysical Review Letters
Volume127
Issue number3
DOIs
Publication statusPublished - 16 Jul 2021

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