Pendulum in Fermi liquid
Timo H. Virtanen, Erkki Thuneberg
TL;DR
This paper applies Fermi liquid theory to analyze how a pendulum's oscillation frequency is affected when immersed in a Fermi liquid, with experimental evidence from helium mixtures.
Contribution
It introduces a novel application of Fermi liquid theory to calculate the Landau force on macroscopic objects like a pendulum.
Findings
Oscillation frequency increases in Fermi liquids
Experimental evidence from 3He-4He mixtures
Validates theoretical predictions of Landau force effects
Abstract
The Fermi liquid theory formulated by Landau is a basic paradigm of the behavior of an interacting many-body system. We present a new application of this theory to calculate "Landau force" on a macroscopic object. We show that immersing a pendulum in Fermi liquid can increase its oscillation frequency, and evidence of this has been observed in mixtures of 3He and 4He.
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