Fri·Aug 15, 2003Friday·August 15, 2003

1. 01*

   A lattice theory for low energy fermions at finite chemical potential

   Jiunn-Wei Chen🇹🇼 · David B. Kaplan🇺🇸

   We construct a lattice theory describing a system of interacting nonrelativistic spin s=1/2 fermions at nonzero chemical potential. The theory is applicable whenever the interparticle separation is large compared to the range of the two-body potential, and does not suffer from a sign problem. In particular, the theory could be useful in studying the thermodynamic limit of fermion systems for which the scattering length is much larger than the interparticle spacing, with applications to realistic atomic systems and dilute neutron gases.

   hep-latcond-mat.str-elnucl-thphysics.atom-phPRL(2004)·80 citations
2. 02*

   Calorons and fermion zero-modes

   Falk Bruckmann🇳🇱 · Margarita Garcia Perez🇪🇸 · Daniel Nogradi🇳🇱 · Pierre van Baal🇳🇱

   Calorons in the confined phase for SU(n) gauge theory, having a non-trivial Polyakov loop, "dissolve" in n monopole constituents for large enough instanton scale parameters. We discuss recent results for these caloron solutions and their fermion zero-modes, as well as the implications for lattice studies and comment on the possible influence of the constituent monopoles on the instanton size distribution.

   hep-lathep-phNucl.Phys.B Proc.Suppl.(2004)·9 citations
3. 03*

   DSEs, the pion, and related matters

   A. Krassnigg🇺🇸 · C.D. Roberts🇺🇸

   We recapitulate on aspects of Dyson-Schwinger equation studies relevant to pseudoscalar mesons: lattice confirmation of the DSE prediction that propagators are nonperturbatively dressed in the infrared; and exact results, e.g., in the chiral limit the leptonic decay constant vanishes for every pseudoscalar meson except the pion.

   ↳ nucl-thhep-exhep-lathep-ph+1Fizika B(2004)·28 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.