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Lattice QCD at finite isospin density at zero and finite temperature | | J. B. Kogut
; D. K. Sinclair
; | | Date: |
27 Feb 2002 | | Journal: | Phys.Rev. D66 (2002) 034505 | | Subject: | hep-lat | | Abstract: | We simulate lattice QCD with dynamical $u$ and $d$ quarks at finite chemical potential, $mu_I$, for the third component of isospin ($I_3$), at both zero and at finite temperature. At zero temperature there is some $mu_I$, $mu_c$ say, above which $I_3$ and parity are spontaneously broken by a charged pion condensate. This is in qualitative agreement with the prediction of effective (chiral) Lagrangians which also predict $mu_c=m_pi$. This transition appears to be second order, with scaling properties consistent with the mean-field predictions of such effective Lagrangian models. We have also studied the restoration of $I_3$ symmetry at high temperature for $mu_I > mu_c$. For $mu_I$ sufficiently large, this finite temperature phase transition appears to be first order. As $mu_I$ is decreased it becomes second order connecting continuously with the zero temperature transition. | | Source: | arXiv, hep-lat/0202028 | | Services: | Forum | Review | PDF | Favorites | |
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