Numerical renormalization group for the bosonic single-impurity Anderson model: Dynamics

Hyun-Jung Lee, Krzysztof Byczuk, and Ralf Bulla
Phys. Rev. B 82, 054516 – Published 20 August 2010

Abstract

The bosonic single-impurity Anderson model (B-SIAM) is studied to understand the local dynamics of an atomic quantum dot (AQD) coupled to a Bose-Einstein condensation (BEC) state, which can be implemented to probe the entanglement and the decoherence of a macroscopic condensate. Our recent approach of the numerical renormalization-group calculation for the B-SIAM revealed a zero-temperature phase diagram, where a Mott phase with local depletion of normal particles is separated from a BEC phase with enhanced density of the condensate. As an extension of the previous work, we present the calculations of the local dynamical quantities of the B-SIAM which reinforce our understanding of the physics in the Mott and the BEC phases.

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  • Received 10 June 2010

DOI:https://doi.org/10.1103/PhysRevB.82.054516

©2010 American Physical Society

Authors & Affiliations

Hyun-Jung Lee1, Krzysztof Byczuk2, and Ralf Bulla3

  • 1Asia Pacific Center for Theoretical Physics, POSTECH, Pohang, Korea
  • 2Institute of Theoretical Physics, University of Warsaw, ul. Hoża 69, 00-681 Warszawa, Poland
  • 3Institut für Theoretische Physik, Universität zu Köln, Köln, Germany

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Issue

Vol. 82, Iss. 5 — 1 August 2010

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