Year: 2024
Type: article
Abstract: Motivated by the remarkable properties of superfluid edge dislocations in $^{4}\mathrm{He}$, 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.
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: Collaborative Research: Worm Algorithm and Diagrammatic Monte Carlo for Strongly Correlated Condensed Matter Systems, Collaborative Research: Worm Algorithm and Diagrammatic Monte Carlo for Strongly Correlated Condensed Matter Systems, Collaborative Research: Worm Algorithm and Diagrammatic Monte Carlo for Strongly Correlated Condensed Matter Systems, Kavli Institute for Theoretical Physics, Collaborative Research: Worm Algorithm and Diagrammatic Monte Carlo for Strongly Correlated Condensed Matter Systems
OpenAlex ID: W4392562274