arXiv subjects

Susan E. Morrison

Publications and source records attributed to Susan E. Morrison.

3 recordsLinked to original sources

arXiv1999

Symmetries and spectrum of SU(2) Lattice Gauge Theory at finite chemical potential

We study SU(2) Lattice Gauge Theory with dynamical fermions at non-zero chemical potential $μ$. The symmetries special to SU(2) for staggered fermions on the lattice are discussed explicitly and their relevance to spectroscopy and condensates at non-zero chemical potential are considered. Using the molecular dynamics algorithm on small lattices we find qualitative changes in the theory's spectroscopy at small and large values of $μ$. This preliminary study should lay the groundwork for future large scale simulations.

hep-lat↗

arXiv1998

Lattice Simulation of Diquark Condensation in Dense Matter

We present results of a Monte Carlo simulation of a three dimensional Gross-Neveu model with SU(2)xSU(2) chiral symmetry at non-zero baryon chemical potential mu, corresponding to non-zero baryon density. For mu sufficiently large there is a sharp transition between a phase where the chiral symmetry is broken by a condensate and one where the global U(1) baryon number symmetry appears to be broken by a scalar diquark condensate . There is also tentative evidence for the formation of a weaker pseudoscalar diquark condensate in the high density phase, which violoates parity.

hep-lat↗

arXiv1998

Lessons from the 3d U(1) Gross-Neveu Model

The effectiveness of the Glasgow algorithm is explored via implementation in the 3d U(1) Gross-Neveu model and the realisation of the Goldstone mechanism in this model is compared and contrasted with its realisation in QCD.

hep-lat↗