Evaluating the phase diagram at finite isospin and baryon chemical potentials in the Nambu-Jona-Lasinio model
文献类型：期刊论文
| 作者 | Mu, Cheng-fu1,2; He, Lian-yi3,4; Liu, Yu-xin1,2,5 |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2010-09-10 |
| 卷号 | 82页码:20 |
| ISSN号 | 1550-7998 |
| DOI | 10.1103/PhysRevD.82.056006 |
| 英文摘要 | We study the phase diagram of two-flavor dense QCD at finite isospin and baryon chemical potentials in the framework of the Nambu-Jona-Lasinio model. We focus on the case with arbitrary isospin chemical potential mu(I) and small baryon chemical potential mu(B) <= mu(X)(B) where mu(X)(B) is the critical chemical potential for the first-order chiral phase transition to happen at mu(I) = 0. The mu(I) - mu(B) phase diagram shows a rich phase structure since the system undergoes a crossover from a Bose-Einstein condensate of charged pions to a BCS superfluid with condensed quark-antiquark Cooper pairs when mu(I) increases at mu(B) = 0, and a nonzero baryon chemical potential serves as a mismatch between the pairing species. We observe a gapless pion condensation phase near the quadruple point (mu(I), mu(B)) = (m(pi,) M-N - 1.5m(pi)) where m(pi), M-N are the vacuum masses of pions and nucleons, respectively. The first-order chiral phase transition becomes a smooth crossover when mu(I) > 0.82m(pi). At very large isospin chemical potential, mu(I) > 6.36m(pi), an inhomogeneous Larkin-Ovchinnikov-Fulde-Ferrell superfluid phase, appears in a window of mu(B), which should in principle exist for arbitrary large mu(I). Between the gapless and the Larkin-Ovchinnikov-Fulde-Ferrell phases, the pion superfluid phase and the normal quark matter phase are connected by a first-order phase transition. In the normal phase above the superfluid domain, we find that charged pions are still bound states even though mu(I) becomes very large, which is quite different from that at finite temperature. Our phase diagram is in good agreement with that found in imbalanced cold atom systems. |
| WOS关键词 | BOSE-EINSTEIN CONDENSATION ; GAPLESS COLOR SUPERCONDUCTIVITY ; NEUTRON-STAR MATTER ; DENSE QUARK MATTER ; PION-CONDENSATION ; CHIRAL-SYMMETRY ; FERMI GAS ; HIGH-TEMPERATURE ; DYNAMICAL MODEL ; CRITICAL FIELD |
| 资助项目 | National Natural Science Foundation of China[10425521] ; National Natural Science Foundation of China[10935001] ; Major State Basic Research Development Program[G2007CB815000] ; China Postdoctoral Science Foundation[20090460168] ; Alexander von Humboldt Foundation |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000281741400007 |
| 资助机构 | National Natural Science Foundation of China ; Major State Basic Research Development Program ; China Postdoctoral Science Foundation ; Alexander von Humboldt Foundation |
| 源URL | [http://119.78.100.186/handle/113462/32253]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Mu, Cheng-fu |
| 作者单位 | 1.Peking Univ, Dept Phys, Beijing 100871, Peoples R China 2.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 3.Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany 4.Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany 5.Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mu, Cheng-fu,He, Lian-yi,Liu, Yu-xin. Evaluating the phase diagram at finite isospin and baryon chemical potentials in the Nambu-Jona-Lasinio model[J]. PHYSICAL REVIEW D,2010,82:20. |
| APA | Mu, Cheng-fu,He, Lian-yi,&Liu, Yu-xin.(2010).Evaluating the phase diagram at finite isospin and baryon chemical potentials in the Nambu-Jona-Lasinio model.PHYSICAL REVIEW D,82,20. |
| MLA | Mu, Cheng-fu,et al."Evaluating the phase diagram at finite isospin and baryon chemical potentials in the Nambu-Jona-Lasinio model".PHYSICAL REVIEW D 82(2010):20. |
入库方式： OAI收割
来源：近代物理研究所
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