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
The Ginzburg–Landau(GL) free energy of crystalline color superconductors is important for understanding the nature of the phase transition to the normal quark matter and predicting the preferred crystal structure. So...The Ginzburg–Landau(GL) free energy of crystalline color superconductors is important for understanding the nature of the phase transition to the normal quark matter and predicting the preferred crystal structure. So far the GL free energy at zero temperature has only been evaluated up to the sixth order in the condensate. To give quantitative reliable predictions we need to evaluate the higher-order terms. In this work,we present a new derivation of the GL free energy by using the discrete Bloch representation of the fermion field. This derivation introduces a simple matrix formalism without any momentum constraint,which may enable us to calculate the GL free energy to arbitrary order by using a computer.展开更多
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.
基金Supported by the National Natural Science Foundation of China under Grant No.11335005the Ministry of Science and Technology under Grant Nos.2013CB922000 and 2014CB845400by the US Department of Energy Topical Collaboration"Neutrinos and Nucleosynthesis in Hot and Dense Matter"
文摘The Ginzburg–Landau(GL) free energy of crystalline color superconductors is important for understanding the nature of the phase transition to the normal quark matter and predicting the preferred crystal structure. So far the GL free energy at zero temperature has only been evaluated up to the sixth order in the condensate. To give quantitative reliable predictions we need to evaluate the higher-order terms. In this work,we present a new derivation of the GL free energy by using the discrete Bloch representation of the fermion field. This derivation introduces a simple matrix formalism without any momentum constraint,which may enable us to calculate the GL free energy to arbitrary order by using a computer.
基金supported by CAS program"Outstanding young scientists abroad brought-in",CAS key project KJCX3-SYW-N2NSFC10735040,NSFC10875134the K.C.Wong Education Foundation, Hong Kong.
