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Aspects of Color Superconductivity in 2-Flavor Quark Matter

Explore chromomagnetic instability, diquark condensate melting, and pairing fluctuation in hot quark matter. Discuss quark matter phase diagram and BCS-BEC crossover. Investigate significance of pairing fluctuation and pseudogap phenomena in color superconductors.

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Aspects of Color Superconductivity in 2-Flavor Quark Matter

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  1. Aspects of Color Superconductivity in 2-flavor Quark Matter Lianyi He Collaborated with Meng Jin, Ying Jiang and Pengfei Zhuang Physics Department, Tsinghua University CSQCD II, KIAA, PKU

  2. Outline • Chromomagnetic instability and melting pattern of diquark condensate • Significance of pairing fluctuation and pseudogap in hot quark matter CSQCD II, KIAA, PKU

  3. Chromomagnetic instability and Melting pattern of diquark condensate CSQCD II, KIAA, PKU

  4. Quark Matter Phase Diagram from NJL weak coupling strong coupling S. B. Ruester, et al, PRD72:034004,2005; D.Blaschke et al, Phys.Rev. D72 (2005) 065020 Comments： 1)Self-consistent treatment of quark masses 2)Need to be improved due to chromomagnetic instability 3)The melting pattern NQ-g2SC-NQ ?! CSQCD II, KIAA, PKU

  5. Chromomagnetic instability Chromomagnetic instability of CSC in neutral quark matter : Meissner mass of some gluons become imaginary! For 2-flavor and zero T, M.Huang and I.Shovkovy, Phys.Rev. D70 (2004) 051501 Blue line: 8th gluon Green line: 4,5,6,7th gluon Similar to the negative superfluid density in asymmetrical fermion superfluids, new interests due to the appearance of instability in the gapped phase CSQCD II, KIAA, PKU

  6. Homogeneous 2SC Solution NQ-g2SC-NQ CSQCD II, KIAA, PKU

  7. T-Dependence of Meissner Masses CSQCD II, KIAA, PKU

  8. LOFF vs Gluonic Phase LOFF Gluonic (simplest version) Gorbar & Miransky, PLB, 2005 CSQCD II, KIAA, PKU

  9. Neutral LOFF solution LOFF 1)anisotropic phases enter the low-T domain 2)Restoration of phase coherence at low T 3)Diquark condensate remains a monotonous function of T O. Kiriyama, arXiv:0709.1083 Similar results for gluonic phase CSQCD II, KIAA, PKU

  10. Quark Matter Phase Diagram LOFF, Gluonic, Mixed phase? Gluonic phase Mixed phase impossible D.Blaschke et al, Phys.Rev. D72 (2005) 065020 CSQCD II, KIAA, PKU

  11. Significance of pairing fluctuation and pseudogap in hot quark matter CSQCD II, KIAA, PKU

  12. BCS-BEC crossover? BCS fermionic superfluidity BEC of molecules Interaction strength Fermions with two spin states with attractive interactions CSQCD II, KIAA, PKU

  13. Temperature effects in BCS-BEC crossover pesudogap bound states CSQCD II, KIAA, PKU

  14. Significance of pairing fluctuation BCS superconductors High Tc superconductors Resonant superfluids with cold atoms Color supercondutors at !!! CSQCD II, KIAA, PKU

  15. Arxiv:0801.1504 CSQCD II, KIAA, PKU

  16. Self-consistent T-matrix theory L.P.Kadanoff and P.C.Martin, Phys.Rev. 124, 670(1961) NSR Levin group, Phys.Rept.412, 1(2005) CSQCD II, KIAA, PKU

  17. No diquark bound states, but pseudogap still exists All colors are gapped at Tc, in contrast to T=0 CSQCD II, KIAA, PKU

  18. CSQCD II, KIAA, PKU

  19. Phase Diagram of High Tc Superconductor CSQCD II, KIAA, PKU

  20. Thank You! CSQCD II, KIAA, PKU

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