Excitation transfer in disordered spin chains with long-range exchange interactions

• URL: http://arxiv.org/abs/2208.04161v3
• Date: Wed, 14 Sep 2022 11:58:18 GMT
• Title: Excitation transfer in disordered spin chains with long-range exchange interactions
• Authors: Nikolaos E. Palaiodimopoulos, Maximilian Kiefer-Emmanouilidis, Gershon Kurizki and David Petrosyan
• Abstract summary: We examine spin excitation or polarization transfer via long-range interacting spin chains with diagonal and off-diagonal disorder. We identify the energy eigenstates of the system with large localization length and sufficient support at the chain boundaries. We quantify the performance of two transfer schemes involving weak static couplings of the sender and receiver spins to the chain.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We examine spin excitation or polarization transfer via long-range interacting spin chains with diagonal and off-diagonal disorder. To this end, we determine the mean localization length of the single-excitation eigenstates of the chain for various strengths of the disorder. We then identify the energy eigenstates of the system with large localization length and sufficient support at the chain boundaries that are suitable to transfer an excitation between the sender and receiver spins connected to the opposite ends of the chain. We quantify the performance of two transfer schemes involving weak static couplings of the sender and receiver spins to the chain, and time-dependent couplings realizing stimulated adiabatic passage of the excitation via the intermediate eigenstates of the chain which exhibits improved performance.

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