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- Title
Dipole superfluid hydrodynamics. Part II.
- Authors
Jain, Akash; Jensen, Kristan; Liu, Ruochuan; Mefford, Eric
- Abstract
We present a dissipative hydrodynamic theory of "s-wave dipole superfluids" that arise in phases of translation-invariant and dipole-symmetric models in which the U(1) symmetry is spontaneously broken. The hydrodynamic description is subtle on account of an analogue of dangerously irrelevant operators, which requires us to formalize an entirely new derivative counting scheme suitable for these fluids. We use our hydrodynamic model to investigate the linearized response of such a fluid, characterized by sound modes ω ~ ±k – ik2, shear modes ω ~ –ik2, and magnon-like propagating modes ω ~ ±k2 – ik4 that are the dipole-invariant version of superfluid "second sound" modes. We find that these fluids can also admit equilibrium states with "dipole superflow" that resemble a polarized medium. Finally, we couple our theory to slowly varying background fields, which allows us to compute response functions of hydrodynamic operators and Kubo formulas for hydrodynamic transport coefficients.
- Subjects
SUPERFLUIDITY; HYDRODYNAMICS; OPERATOR functions; SPACE-time symmetries; SHEAR waves
- Publication
Journal of High Energy Physics, 2024, Vol 2024, Issue 7, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP07(2024)197