Josephson Effects in a Bose-Einstein Condensate of Magnons
Roberto E. Troncoso, \'Alvaro S. N\'u\~nez
TL;DR
This paper develops a phenomenological theory for the collective dynamics of magnon Bose-Einstein condensates, exploring Josephson effects and oscillations between separated magnon clouds in a magnonic Josephson junction.
Contribution
It introduces a new phenomenological framework to describe Josephson effects in magnon BECs and provides detailed calculations of Josephson oscillations in such systems.
Findings
Demonstrates spontaneous macroscopic interference between magnon clouds
Calculates Josephson oscillations in a magnonic junction
Highlights the relation between magnon interference and Josephson effects
Abstract
A phenomenological theory is developed, that accounts for the collective dynamics of a Bose-Einstein condensate of magnons. In terms of such description we discuss the nature of spontaneous macroscopic interference between magnon clouds, highlighting the close relation between such effects and the well known Josephson effects. Using those ideas we present a detailed calculation of the Josephson oscillations between two magnon clouds, spatially separated in a magnonic Josephson junction.
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