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arXiv 2104.07559cond-mat.str-elcond-mat.stat-mech
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量子自旋液体的流体力学

Hydrodynamics of quantum spin liquids

Vir B. Bulchandani, Benjamin Hsu, Christopher P. Herzog, S. L. Sondhi

摘要:

量子自旋液体是低温下在受抑量子磁体中产生的物质的拓扑状态。在低能量下,这种状态表现出涌现的规范场和分形准粒子,并且与它们的母体微观哈密顿量相比,还可以具有增强的全局对称性。我们研究了这种涌现规范和对称结构对量子自旋液体流体力学的影响。具体来说,我们分析了两种情况下,与费米表面的$U(1)$自旋液体和$SU(4)$对称的“代数”自旋液体。我们表明,新兴的自由度在自旋液相导致各种额外的流体动力学模式相比,高温顺磁相。我们确定了一个流体动力学制度的内部$U(1)$规范场共同的两个国家,其特点是缓慢扩散的内部横向光子。

英文摘要:

Quantum spin liquids are topological states of matter that arise in frustrated quantum magnets at low temperatures. At low energies, such states exhibit emergent gauge fields and fractionalized quasiparticles and can also possess enhanced global symmetries compared to their parent microscopic Hamiltonians. We study the consequences of this emergent gauge and symmetry structure for the hydrodynamics of quantum spin liquids. Specifically, we analyze two cases, the $U(1)$ spin liquid with a Fermi surface and the $SU(4)$-symmetric "algebraic" spin liquid. We show that the emergent degrees of freedom in the spin liquid phase lead to a variety of additional hydrodynamic modes compared to the high-temperature paramagnetic phase. We identify a hydrodynamic regime for the internal $U(1)$ gauge field common to both states, characterized by slow diffusion of the internal transverse photon.

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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