Vortex-mediated relaxation of magnon BEC into light Higgs quasiparticles
Vortex-mediated relaxation of magnon BEC into light Higgs quasiparticles
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DOI：
10.1103/physrevresearch.3.l032002
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发表时间：
2021-07-02
影响因子：
4.2
通讯作者：
Eltsov, V. B.
中科院分区：
文献类型：
--
作者：
Autti, S.;Heikkinen, P. J.;Eltsov, V. B.
超流He-3中的磁振子玻色-爱因斯坦凝聚（BEC）是研究周围宏观量子系统的一种很好的工具。在零温度下，由于量子真空中的动量和能量守恒，BEC会以几种不同的形式衰变为其他集体激发。我们研究了涡旋-希格斯机制：涡旋放松了动量守恒的要求，允许BEC的光学磁振子转变为轻希格斯准粒子。这有利于直接测量B相双核涡旋的尺寸，为实验研究难以捉摸的现象提供了机会，例如开尔文波级联和核束缚的马约拉纳费米子。本文拓展了He-3-B中磁准粒子之间可能的相互作用谱，为构建磁振子量子器件奠定了基础。
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.