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Résumé |
Motivated by remarkable properties of superfluid edge dislocations in solid Helium-4—responsible for the
unique supertransoprt-through-solid and “syringe” effects, we reveal 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. Transverse quantum fluids provide us with a striking
demonstration of conditional character of many dogmas associated with superfluidity, such as the necessity
of elementary excitations, in general, and the ones obeying Landau criterion in particular, as well as the
absence of long-range order in one-dimensional quantum superfluids. |
