Temperature dependence of critical velocities and long time decay of supercurrents

TL;DR

This paper presents a microscopic theory of superfluidity that explains how critical velocities depend on temperature and describes the long-term decay of supercurrents.

Contribution

It introduces a microscopic framework based on the many-body spectrum to naturally account for temperature effects and supercurrent decay in superfluids.

Findings

Critical velocities vary with temperature as explained by the theory.

Long time decay of supercurrents is accounted for by the microscopic model.

The theory aligns with observed superfluid behaviors.

Abstract

We show that a microscopic theory of superfluidity, based on the properties of the many-body spectrum of a superfluid, can explain naturally the temperature dependence of critical velocities and the long time decay of supercurrents.