Dephasing with strings attached

Article

关键词: SCHRIEFFER-HEEGER MODEL;    TRAPPED ATOMIC IONS;    MANY-BODY SYSTEM;    SOLID HE-4;    SPIN ICE;    QUANTUM;    DIFFUSION;    HYDROGEN;    ANTIFERROMAGNET;    EXCITATIONS;   

DOI  :  10.1103/PhysRevB.97.085121

来源: SCIE

【 摘 要 】

Motivated by the existence of mobile low-energy excitations like domain walls in one dimension (1D) or gauge-charged fractionalized particles in higher dimensions, we compare quantum dynamics in the presence of weak Markovian dephasing for a particle hopping on a chain and for an Ising domain wall whose motion leaves behind a string of flipped spins. Exact solutions show that the two models have near identical transport responses in the bulk. On the other hand, in finite-length chains, the broadening of discrete spectral lines is much more noticeable in the case of a domain wall. These results may be of relevance to a broad class of systems including quasi-1D antiferromagnets, polymer chains, and even retinal systems.

【 授权许可】

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