Projects per year
Abstract
A magnon Bose-Einstein condensate (BEC) in superfluid 3He 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 3He-B and lays the groundwork for building magnon-based quantum devices.
Original language | English |
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Article number | L032002 |
Number of pages | 6 |
Journal | Physical Review Research |
Volume | 3 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2 Jul 2021 |
Keywords
- magnon quasiparticle excitation
- topological defect
- helium-3
- Bose-Einstein condensates
- superfluid
- NMR
- topological superfluid
Projects
- 1 Finished
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EMP: European Microkelvin Platform
Saunders, J. (PI), Casey, A. (CoI), Astafiev, O. (CoI), Nyeki, J. (CoI) & Levitin, L. (CoI)
1/01/19 → 31/12/23
Project: Research