The effective potential analysis indicates that, in a 3D two-flavor Gross-Neveu model in vacuum, depending on whether Gs/Hp is less or bigger than the critical value 2/3, where G s and H p are respectively the couplin...The effective potential analysis indicates that, in a 3D two-flavor Gross-Neveu model in vacuum, depending on whether Gs/Hp is less or bigger than the critical value 2/3, where G s and H p are respectively the coupling constants of scalar quark-antiquark channel and pseudoscalar diquark channel, the system will have the ground state with pure diquark condensates or with pure quark-antiquark condensates, but never with coexistence of the two forms of condensates. The similarities and differences in the interplay between the quark-antiquark and the diquark condensates in vacuum in the 2D, 3D and 4D two-flavor four-fermion interaction models are summarized.展开更多
Near the flavor SU（3） limit, we propose an analytical description for color-flavor-locked-type Bardeen- Cooper-Schrieffer （BCS） phase in the Nambu Jona-Lasinio （NJL） model. The diquark behaviors in light-flavor ...Near the flavor SU（3） limit, we propose an analytical description for color-flavor-locked-type Bardeen- Cooper-Schrieffer （BCS） phase in the Nambu Jona-Lasinio （NJL） model. The diquark behaviors in light-flavor and strange-flavor-involved channels and Bose-Einstein condensation （BEC） of bound diquark states are studied. When the attractive interaction between quarks is strong enough, a BCS-BEC crossover is predicted in the environment with color-flavor-locked pairing pattern. The resulting Bose-Einstein condensed phase is found to be an intergrade phase before the emergence of the previous-predicted BEC phase in two-flavor quark superconductor.展开更多
基金The project supported by National Natural Science Foundation of China under Grant No. 10475113
文摘The effective potential analysis indicates that, in a 3D two-flavor Gross-Neveu model in vacuum, depending on whether Gs/Hp is less or bigger than the critical value 2/3, where G s and H p are respectively the coupling constants of scalar quark-antiquark channel and pseudoscalar diquark channel, the system will have the ground state with pure diquark condensates or with pure quark-antiquark condensates, but never with coexistence of the two forms of condensates. The similarities and differences in the interplay between the quark-antiquark and the diquark condensates in vacuum in the 2D, 3D and 4D two-flavor four-fermion interaction models are summarized.
基金Supported by the National Natural Science Foundation of China under Grant No.10875058
文摘Near the flavor SU（3） limit, we propose an analytical description for color-flavor-locked-type Bardeen- Cooper-Schrieffer （BCS） phase in the Nambu Jona-Lasinio （NJL） model. The diquark behaviors in light-flavor and strange-flavor-involved channels and Bose-Einstein condensation （BEC） of bound diquark states are studied. When the attractive interaction between quarks is strong enough, a BCS-BEC crossover is predicted in the environment with color-flavor-locked pairing pattern. The resulting Bose-Einstein condensed phase is found to be an intergrade phase before the emergence of the previous-predicted BEC phase in two-flavor quark superconductor.
