title: Pendulum in a Fermi liquid.
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 the "Landau force" on a macroscopic object. We show that immersing a pendulum in a Fermi liquid can increase its oscillation frequency, and evidence of this has been observed in mixtures of (3)He and (4)He.
authors.affiliation: Department of Physics, University of Oulu, FI-90014 Oulu, Finland.
authors.forename: Timo H
authors.initials: TH
authors.lastname: Virtanen
authors.forename: Erkki
authors.initials: E
authors.lastname: Thuneberg