eprintid: 1455021
rev_number: 29
eprint_status: archive
userid: 608
dir: disk0/01/45/50/21
datestamp: 2014-11-07 19:37:39
lastmod: 2021-10-05 00:43:10
status_changed: 2016-02-16 14:44:41
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Thomson, SJ
creators_name: Krüger, F
title: Replica symmetry breaking in the Bose glass
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F64
note: Copyright © EPLA, 2014.
abstract: We investigate the nature of the Bose glass phase of the disordered Bose-Hubbard model in d > 2 and demonstrate the existence of a glass-like replica symmetry breaking (RSB) order parameter in terms of particle number fluctuations. Starting from a strong-coupling expansion around the atomic limit, we study the instability of the Mott insulator towards the formation of a Bose glass. We add some infinitesimal RSB, following the Parisi hierarchical approach in the most general form, and observe its flow under the momentum-shell renormalization group scheme. We find a new fixed point with one-step RSB, corresponding to the transition between the Mott insulator and a Bose glass phase with hitherto unseen RSB. The susceptibility associated to infinitesimal RSB perturbation in the Mott insulator is found to diverge at the transition with an exponent $\gamma=1/d$ . Our findings are consistent with the expectation of glassy behavior and the established breakdown of self-averaging. We discuss the possibility of measuring the glass-like order parameter in optical-lattice experiments as well as in certain spin systems that are in the same universality class as the Bose-Hubbard model.
date: 2014-11
official_url: http://dx.doi.org/10.1209/0295-5075/108/30002
vfaculties: VMPS
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_source: WoS-Lite
elements_id: 992433
doi: 10.1209/0295-5075/108/30002
lyricists_name: Kruger, Frank
lyricists_id: FKRUG35
full_text_status: public
publication: EPL
volume: 108
number: 3
article_number: 30002
issn: 0295-5075
citation:        Thomson, SJ;    Krüger, F;      (2014)    Replica symmetry breaking in the Bose glass.                   EPL , 108  (3)    , Article 30002.  10.1209/0295-5075/108/30002 <https://doi.org/10.1209/0295-5075%2F108%2F30002>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1455021/1/Kruger_rsb_corr2.pdf