Toward electrodynamics of unconventional phases of dilute nuclear matter
Toward electrodynamics of unconventional phases of dilute nuclear matter
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DOI：
10.1088/1742-6596/1041/1/012008
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发表时间：
2017-11
期刊：
影响因子：
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通讯作者：
A. Sedrakian;J. W. Clark
中科院分区：
文献类型：
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作者：
A. Sedrakian;J. W. Clark
同位旋非对称核物质的相图可能具有许多非常规相，包括对称和旋转对称但同位旋非对称的BCS凝聚体，载流Larkin-Ovchinnikov-Fulde-Ferrell（LOFF）相和非均相分离相。由于凝聚体的库珀对携带单个单位电荷，因此这些相是带电超导体，并通过形成域（I型超导性）或量子涡旋（II型超导性）来响应电磁规范场。我们评估了金兹伯格-朗道（GL）参数的相图，发现非常规阶段的同位旋不对称核物质是良好的II型超导体，并应形成Abrikosov涡旋的磁通量的量子的两倍。我们还发现，LOFF相的边界过渡到第一型状态，与GL参数接近的临界值1/2。
The phase diagram of isospin-asymmetrical nuclear matter may feature a number of unconventional phases, which include the translationally and rotationally symmetric, but isospin-asymmetrical BCS condensate, the current-carrying Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) phase, and the heterogeneous phase-separated phase. Because the Cooper pairs of the condensate carry a single unit of charge, these phases are charged superconductors and respond to electromagnetic gauge fields by either forming domains (type-I superconductivity) or quantum vortices (type-II superconductivity). We evaluate the Ginzburg-Landau (GL) parameter across the phase diagram and find that the unconventional phases of isospin-asymmetrical nuclear matter are good type-II superconductors and should form Abrikosov vortices with twice the quantum of magnetic flux. We also find that the LOFF phase at the boundary of the transition to the type-I state, with the GL parameter being close to the critical value 1/2.