Diquark Bose Condensates in High Density Matter and Instantons

R. Rapp; T. Schäfer; E. Shuryak; M. Velkovsky

doi:10.1103/PhysRevLett.81.53

Diquark Bose Condensates in High Density Matter and Instantons

R. Rapp, T. Schäfer, E. Shuryak, and M. Velkovsky

Phys. Rev. Lett. 81, 53 – Published 6 July 1998

Abstract

Instantons lead to strong correlations between up and down quarks with spin zero and antisymmetric color wave functions. In cold and dense matter, $n_{b} > n_{c} ≃ 1 {fm}^{- 3}$ and $T < T_{c} \sim 50$ MeV, these pairs Bose condense, replacing the usual $〈 \bar{q} q 〉$ condensate and restoring chiral symmetry. At high density, the ground state is a color superconductor in which diquarks play the role of Cooper pairs. An interesting toy model is provided by QCD with two colors: it has a particle-antiparticle symmetry which relates $〈 \bar{q} q 〉$ and $〈 qq 〉$ condensates.

Received 19 December 1997

DOI:https://doi.org/10.1103/PhysRevLett.81.53

Authors & Affiliations

R. Rapp¹, T. Schäfer², E. Shuryak¹, and M. Velkovsky³

¹Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794-3800
²Institute for Nuclear Theory, Department of Physics, University of Washington, Seattle, Washington 98195
³Nuclear Theory Group, Brookhaven National Laboratory, Upton, New York 11973-5000