Effective Theory of a Chiral Superfluid

TL;DR

This paper develops an effective field theory for a chiral superfluid on two-dimensional planes, revealing unique electromagnetic responses and properties that extend to superconductors within a universal class.

Contribution

It introduces a novel effective Lagrangian framework capturing the physics of chiral superfluids and their electromagnetic interactions, including chirality and anisotropic Meissner effects.

Findings

Spectrum analysis shows unique chiral excitations.

Polarization studies reveal chirality in electromagnetic scattering.

Magnetic response exhibits anisotropic Meissner effect.

Abstract

We consider an effective Lagrangian describing a fluid living on two-di\-men\-sio\-nal planes. The fluid self-interacts through a Chern-Simons vector potential, whose field strength is proportional to the density fluctuation. This effective Lagrangian can be related to the Anyon mean field, but can also be considered more generally to describe a universality class of superfluids and, when charged, of superconductors. We study the relevant physical properties, including the spectrum, the chirality features appearing in the polarization of scattered EM waves, and the peculiar response under a magnetic field, i.e. a peculiar kind of anisotropic Meissner effect.