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Transverse quantum fluids
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DOI：10.1103/PhysRevB.109.L100502.png)
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Abstract
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Motivated by the remarkable properties of superfluid edge dislocations in 4He, we discuss a broad class of quantum systems-boundaries in phase -separated lattice states, magnetic domain walls, and ensembles of Luttinger liquids-that can be classified as transverse quantum fluids (TQFs). After introducing the general idea of a TQF, we focus on a coupled array of Luttinger liquids forming an incoherent TQF. This state is a long-range ordered quasi -one-dimensional superfluid, topologically protected against quantum phase slips by the tight binding of instanton dipoles, that has no coherent quasiparticle excitations at low energies. An incoherent TQF is a striking example of the irrelevance of the Landau quasiparticle criterion for superfluidity in systems that lack Galilean invariance. We detail its phenomenology, to motivate a number of experimental studies in condensed matter and cold atomic systems.
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3.7
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15.4W
Citations:
41.0W