Symmetry Oscillations in Strongly Interacting One-Dimensional Mixtures

IF 8.1 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Physical review letters Pub Date : 2024-10-29 DOI:10.1103/physrevlett.133.183402
S. Musolino, M. Albert, A. Minguzzi, P. Vignolo
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Abstract

Multicomponent quantum mixtures in one dimension can be characterized by their symmetry under particle exchange. For a strongly interacting Bose-Bose mixture, we show that the time evolution of the momentum distribution from an initially symmetry-mixed state is quasiconstant for a SU(2) symmetry conserving Hamiltonian, while it displays large oscillations in time for the symmetry-breaking case where inter- and intraspecies interactions are different. Using the property that the momentum distribution operator at strong interactions commutes with the class-sum operator, the latter acting as a symmetry witness, we show that the momentum distribution oscillations correspond to symmetry oscillations, with a mechanism analogous to neutrino flavor oscillations.
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强相互作用一维混合物中的对称振荡
一维多组分量子混合物可以通过粒子交换下的对称性来表征。对于强相互作用的玻色-玻色混合物,我们证明了从最初的对称混合态开始的动量分布的时间演化对于保持 SU(2) 对称性的哈密顿来说是等恒定的,而对于种间和种内相互作用不同的对称性破缺情况,它在时间上显示出很大的振荡。利用强相互作用下的动量分布算子与类和算子相乘(后者充当对称性见证)的特性,我们证明了动量分布振荡对应于对称性振荡,其机制类似于中微子的味道振荡。
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来源期刊
Physical review letters
Physical review letters 物理-物理:综合
CiteScore
16.50
自引率
7.00%
发文量
2673
审稿时长
2.2 months
期刊介绍: Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics: General physics, including statistical and quantum mechanics and quantum information Gravitation, astrophysics, and cosmology Elementary particles and fields Nuclear physics Atomic, molecular, and optical physics Nonlinear dynamics, fluid dynamics, and classical optics Plasma and beam physics Condensed matter and materials physics Polymers, soft matter, biological, climate and interdisciplinary physics, including networks
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