Twenty years of magnon Bose condensation and spin current superfluidity in 3He-B

Abstract

20 years ago a new quantum state of matter was discovered and identified. The observed dynamic quantum state of spin precession in superfluid 3He-B bears the properties of spin current superfluidity, Bose condensation of spin waves -- magnons, off-diagonal long-range order and related phenomena of quantum coherence

Comments: 18 pages in JLTP format, 2 figures, version accepted in JLTP, reference added