Journal article 958 views
Towards the phase diagram of dense two-color matter
Seamus Cotter,
Pietro Giudice,
Simon Hands,
Jon-Ivar Skullerud
Physical Review D, Volume: 87, Issue: 3, Start page: 034507
Swansea University Author: Simon Hands
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DOI (Published version): 10.1103/PhysRevD.87.034507
Abstract
We study two-color QCD with two flavors of Wilson fermion as a function of quark chemical potential mu and temperature T. We find evidence of a superfluid phase at intermediate mu and low T where the quark number density and diquark condensate are both very well described by a Fermi sphere of nearly...
| Published in: | Physical Review D |
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| ISSN: | 1550-7998 1550-2368 |
| Published: |
2013
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa13404 |
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| Abstract: |
We study two-color QCD with two flavors of Wilson fermion as a function of quark chemical potential mu and temperature T. We find evidence of a superfluid phase at intermediate mu and low T where the quark number density and diquark condensate are both very well described by a Fermi sphere of nearly-free quarks disrupted by a BCS condensate. Our results suggest that the quark contribution to the energy density is negative (and balanced by a positive gauge contribution), although this result is highly sensitive to details of the energy renormalisation. We also find evidence that the chiral condensate in this region vanishes in the massless limit. This region gives way to a region of deconfined quark matter at higher T and mu, with the deconfinement temperature, determined from the renormalised Polyakov loop, decreasing only very slowly with increasing chemical potential. The quark number susceptibility chi_q does not exhibit any qualitative change at the deconfinement transition. We argue that this is because chi_q is not an appropriate measure of deconfinement for 2-color QCD at high density |
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| Item Description: |
arXiv:1210.4496 |
| College: |
Faculty of Science and Engineering |
| Issue: |
3 |
| Start Page: |
034507 |