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Two Toy Spin Chain Models of Decoherence
Published 6 May 2024 in quant-ph and cond-mat.other | (2405.03795v1)
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.
- U. Weiss, “Quantum Dissipative Systems”, World scientific, 4th edition (2012)
- For a general reference on infrared divergences in both quantum gravity and quantum electrodynamics, see A. Strominger, “Lectures on the Infrared Structure of Gravity and Gauge Theory”, Princeton University Press (2018). For our recent point of view on the subject, see C. DeLisle, J. Wilson-Gerow, P.C.E. Stamp, JHEP 03, 290 (2021)
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