Hydrodynamics of quantum spin liquids
arXiv:2104.07559 · doi:10.1103/PhysRevB.104.235412
Abstract
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 spin liquid with a Fermi surface and the -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 gauge field common to both states, characterized by slow diffusion of the internal transverse photon.
arXiv commentv2: 11+4 pages, 1 figure, accepted version
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