Bimodal momentum distribution of the high-density supersolid state

Takahiro Ohgoe, Takafumi Suzuki, Naoki Kawashima

Research output: Contribution to journalArticle

Abstract

By performing exact quantum Monte Carlo simulations, we study the momentum distribution of the supersolid state in the two-dimensional extended Bose- Hubbard model with the nearest-neighbor repulsion. For strong nearest-neighbor repulsions, the supersolid state is stable in a broad region up to large hopping amplitudes and high particle densities. In the supersolid state, the momentum distribution shows a bimodal structure with two peaks related to the superfluidity and solidity respectively. By our calculations, we show that the bimodal structure becomes clearer as the chemical potential (or the particle density) is increased.

Original languageEnglish
Pages (from-to)309-314
Number of pages6
JournalJournal of Low Temperature Physics
Volume171
Issue number3-4
DOIs
Publication statusPublished - 2013 Jan 1
Externally publishedYes

Keywords

  • Bose gases
  • Optical lattice
  • Quantum Monte Carlo simulation
  • Supersolid

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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