541 citations · 2.5k across the 53 of their papers we have counts for
11 papers · 1 filter
Spin Coherent-State Path Integrals and the Instanton Calculus
Anupam Garg, Evgueny Kochetov, Kee-Su Park +1
We use an instanton approximation to the continuous-time spin coherent-state path integral to obtain the tunnel splitting of classically degenerate ground states. We show that prov…
Wave Equation for Sound in Fluids with Vorticity
Santiago Esteban Perez Bergliaffa, Katrina Hibberd, Michael Stone +1
We use Clebsch potentials and an action principle to derive a closed system of gauge invariant equations for sound superposed on a general background flow. Our system reduces to th…
Phonons and Forces: Momentum versus Pseudomomentum in Moving Fluids
Michael Stone
I provide a pedagogical introduction to the notion of pseudomomentum for waves in a medium, and show how changes in pseudomomentum may sometimes be used to compute real forces. I t…
The Semiclassical Propagator for Spin Coherent States
Michael Stone, Kee-Su Park, Anupam Garg
We use a continuous-time path integral to obtain the semiclassical propagator for minimal-spread spin coherent states. We pay particular attention to the ``extra phase'' discovered…
Iordanskii Force and the Gravitational Aharonov-Bohm effect for a Moving Vortex
Michael Stone
I discuss the scattering of phonons by a vortex moving with respect to a superfluid condensate. This allows us to test the compatibility of the scattering-theory derivation of the…
Magnus and Other Forces on Vortices in Superfluids and Superconductors
Michael Stone
This is the text of a talk which is to be published in the proceedings of the Joint APCTP-ICTP conference (Seoul National University Korea, May 26th-30th 1997).