Quantum Monte Carlo calculation of the zero-temperature phase diagram of the two-component fermionic hard-core gas in two dimensions

Drummond, Neil and Cooper, N. R. and Needs, R. J. and Shlyapnikov, G. V. (2011) Quantum Monte Carlo calculation of the zero-temperature phase diagram of the two-component fermionic hard-core gas in two dimensions. Physical review B, 83 (19). ISSN 1550-235X

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Abstract

Motivated by potential realizations in cold-atom or cold-molecule systems, we have performed quantum Monte Carlo simulations of two-component gases of fermions in two dimensions with hard-core interactions. We have determined the gross features of the zero-temperature phase diagram by investigating the relative stabilities of paramagnetic and ferromagnetic fluids and crystals. We have also examined the effect of including a pairwise, long-range r^3 potential between the particles. Our most important conclusion is that there is no region of stability for a ferromagnetic fluid phase, even if the long-range interaction is present. We also present results for the pair-correlation function, static structure factor, and momentum density of two-dimensional hard-core fluids.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Additional Information:
©2011 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/aacsb/disciplinebasedresearch
Subjects:
ID Code:
52372
Deposited By:
Deposited On:
23 Jan 2012 10:06
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Sep 2020 02:15