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Title: Quench in the 1D Bose-Hubbard model: Topological defects and excitations from the Kosterlitz-Thouless phase transition dynamics

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep05950· OSTI ID:1624731
 [1];  [2]
  1. Jagiellonian Univ., Krakow (Poland). Inst. of Physics
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Kibble-Zurek mechanism (KZM) uses critical scaling to predict density of topological defects and other excitations created in second order phase transitions. We point out that simply inserting asymptotic critical exponents deduced from the immediate vicinity of the critical point to obtain predictions can lead to results that are inconsistent with a more careful KZM analysis based on causality – on the comparison of the relaxation time of the order parameter with the ‘‘time distance’’ from the critical point. As a result, scaling of quench-generated excitations with quench rates can exhibit behavior that is locally (i.e., in the neighborhood of any given quench rate) well approximated by the power law, but with exponents that depend on that rate, and that are quite different from the naive prediction based on the critical exponents relevant for asymptotically long quench times. Kosterlitz-Thouless scaling (that governs e.g. Mott insulator to superfluid transition in the Bose-Hubbard model in one dimension) is investigated as an example of this phenomenon.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1624731
Journal Information:
Scientific Reports, Vol. 4, Issue 1; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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One-dimensional Bose gas driven by a slow time-dependent harmonic trap journal September 2017
Kibble Zurek mechanism of topological defect formation in quantum field theory with matrix product states journal May 2018
Dynamics of the quantum phase transition in the one-dimensional Bose-Hubbard model: Excitations and correlations induced by a quench journal March 2017
Crossover from Classical to Quantum Kibble-Zurek Scaling journal June 2016
Emergence of coherence and the dynamics of quantum phase transitions text January 2014
Exploring the Kibble-Zurek mechanism with homogeneous Bose gases text January 2016
Ice-rule made manifold: phase transitions, topological defects and manifold restoration in two-dimensional artificial spin systems text January 2019