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arXiv 0710.0331hep-phastro-phcond-mat.supr-congr-qcnucl-th
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晶体彩色超导体的强度

The strength of crystalline color superconductors

Massimo Mannarelli, Krishna Rajagopal, Rishi Sharma

摘要:

我们提出了一个研究的夸克物质的结晶色超导相的剪切模量,表明这一阶段的密集,但不是渐近密集,夸克物质响应剪切应力作为一个非常刚性的固体。该相位的特征在于间隙参数$Δ$,该间隙参数在空间中被周期性调制,因此自发地破坏平移不变性。我们推导出描述由$Δ$形成的晶体结构的空间和时间相关的波动的声子场的有效作用量,并从空间导数项的系数获得剪切模量。在Ginzburg-Landau近似下,我们发现剪切模量比中子星壳的剪切模量大20到1000倍。因此,这种物质相比宇宙中任何已知的物质都更坚硬,但同时,晶体色超导相也是超流体。这些性质提出了一种可能性,即在中子星中存在这种相可能对它们的现象学有不同的影响。例如,(某些)脉冲星的故障可能起源于结晶超导中子星的核心。

英文摘要:

We present a study of the shear modulus of the crystalline color superconducting phase of quark matter, showing that this phase of dense, but not asymptotically dense, quark matter responds to shear stress as a very rigid solid. This phase is characterized by a gap parameter $Δ$ that is periodically modulated in space and therefore spontaneously breaks translational invariance. We derive the effective action for the phonon fields that describe space- and time-dependent fluctuations of the crystal structure formed by $Δ$, and obtain the shear modulus from the coefficients of the spatial derivative terms. Within a Ginzburg-Landau approximation, we find shear moduli which are 20 to 1000 times larger than those of neutron star crusts. This phase of matter is thus more rigid than any known material in the universe, but at the same time the crystalline color superconducting phase is also superfluid. These properties raise the possibility that the presence of this phase within neutron stars may have distinct implications for their phenomenology. For example, (some) pulsar glitches may originate in crystalline superconducting neutron star cores.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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