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Exact quantum dynamics of XXZ central spin problems

He, Wen-Bin; Chesi, Stefano; Lin, Hai-qing; Guan, Xi-Wen


We obtain analytically close forms of benchmark quantum dynamics of the collapse and revival (CR), the reduced density matrix, Von Neumann entropy, and fidelity for the XXZ central spin problem. These quantities characterize the quantum decoherence and entanglement of the system with any number of bath spins, and for a short to infinitely long time evolution. For the homogeneous central spin problem, the effective magnetic field B, coupling constant A, and longitudinal interaction ...[Show more]

CollectionsANU Research Publications
Date published: 2019
Type: Journal article
Source: Physical Review B
DOI: 10.1103/PhysRevB.99.174308
Access Rights: Open Access


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