Vortex-mediated relaxation of magnon BEC into light Higgs quasiparticles

S. Autti*, P. J. Heikkinen, S. M. Laine, J. T. Makinen, E. Thuneberg, V. V. Zavjalov, V. B. Eltsov

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
53 Downloads (Pure)


A magnon Bose-Einstein condensate (BEC) in superfluid He-3 is a fine instrument for studying the surrounding macroscopic quantum system. At zero temperature, the BEC is subject to a few distinct forms of decay into other collective excitations, owing to momentum and energy conservation in a quantum vacuum. We study the vortex-Higgs mechanism: The vortices relax the requirement for momentum conservation, allowing the optical magnons of the BEC to transform into light Higgs quasiparticles. This facilitates a direct measurement of the dimensions of the B-phase double-core vortex, providing experimental access to elusive phenomena, such as the Kelvin wave cascade and core-bound Majorana fermions. Our paper expands the spectrum of possible interactions between magnetic quasiparticles in He-3-B and lays the groundwork for building magnon-based quantum devices.

Original languageEnglish
Article numberL032002
Number of pages6
Issue number3
Publication statusPublished - Sept 2021
MoE publication typeA1 Journal article-refereed




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