Two Toy Spin Chain Models of Decoherence

2024/05/06 by Zhu, P. C. E. Stamp Zhen
#FOS: Physical sciences #Other Condensed Matter (cond-mat.other) #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2405.03795

Abstract

We solve for the decoherence dynamics of two models in which a simple qubit or Central Spin couples to a bath of spins; the bath is made from a chain of spins. In model 1, the bath spins are Ising spins; in Model 2, they are coupled by transverse spin-spin interactions, and the chain supports spin waves. We look at (i) the case where the Hamiltonian is static, with a constant system/bath coupling, and (ii) where this coupling varies in time.

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