Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8199184 | Physics Letters B | 2006 | 6 Pages |
Abstract
We present results of numerical simulations of the 2+1d Nambu-Jona-Lasinio model with non-zero baryon chemical potential μ and spatially-varying complex diquark source strength j. By choosing arg(j) to vary smoothly through 2Ï across the spatial extent of the lattice, a baryon number current is induced which in the high density phase remains non-vanishing as |j|â0; we are hence able to extract a quantity characteristic of a superfluid known as the helicity modulus. We also study supercurrent flow at non-zero temperature and estimate the critical temperature at which the normal phase is restored, which is consistent with the conventional picture for thin-film superfluids in which the transition is viewed in terms of vortex-anti-vortex unbinding.
Related Topics
Physical Sciences and Engineering
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Authors
Simon Hands, Avtar Singh Sehra,