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Title: Phase separation in a two-species Bose mixture

Abstract

We obtain the ground-state quantum phase diagram for a two-species Bose mixture in a one-dimensional optical lattice using the finite-size density-matrix renormalization group method. We discuss our results for different combinations of inter- and intraspecies interaction strengths with commensurate and incommensurate fillings of the bosons. The phases we have obtained are a superfluid and a Mott insulator, and a phase separation where the two different species reside in spatially separate regions. The spatially separated phase is further classified into phase-separated superfluid and Mott insulator. The phase separation appears for all the fillings we have considered, whenever the interspecies interaction is slightly larger than the intraspecies interactions.

Authors:
;  [1];  [2]
  1. Indian Institute of Astrophysics, II Block, Kormangala, Bangalore, 560 034 (India)
  2. Department of Physics, Goa University, Taleigao Plateau, Goa 403 206 (India)
Publication Date:
OSTI Identifier:
21011273
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 76; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevA.76.013604; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BOSONS; DENSITY MATRIX; GROUND STATES; INTERACTIONS; MIXTURES; ONE-DIMENSIONAL CALCULATIONS; OPTICAL MODELS; PHASE DIAGRAMS; RENORMALIZATION; SUPERFLUIDITY

Citation Formats

Mishra, Tapan, Das, B P, and Pai, Ramesh V. Phase separation in a two-species Bose mixture. United States: N. p., 2007. Web. doi:10.1103/PHYSREVA.76.013604.
Mishra, Tapan, Das, B P, & Pai, Ramesh V. Phase separation in a two-species Bose mixture. United States. doi:10.1103/PHYSREVA.76.013604.
Mishra, Tapan, Das, B P, and Pai, Ramesh V. Sun . "Phase separation in a two-species Bose mixture". United States. doi:10.1103/PHYSREVA.76.013604.
@article{osti_21011273,
title = {Phase separation in a two-species Bose mixture},
author = {Mishra, Tapan and Das, B P and Pai, Ramesh V},
abstractNote = {We obtain the ground-state quantum phase diagram for a two-species Bose mixture in a one-dimensional optical lattice using the finite-size density-matrix renormalization group method. We discuss our results for different combinations of inter- and intraspecies interaction strengths with commensurate and incommensurate fillings of the bosons. The phases we have obtained are a superfluid and a Mott insulator, and a phase separation where the two different species reside in spatially separate regions. The spatially separated phase is further classified into phase-separated superfluid and Mott insulator. The phase separation appears for all the fillings we have considered, whenever the interspecies interaction is slightly larger than the intraspecies interactions.},
doi = {10.1103/PHYSREVA.76.013604},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 76,
place = {United States},
year = {2007},
month = {7}
}