Fast and robust magnon transport in a spin chain

• URL: http://arxiv.org/abs/2101.04995v2
• Date: Mon, 29 Mar 2021 10:26:23 GMT
• Title: Fast and robust magnon transport in a spin chain
• Authors: Anthony Kiely and Steve Campbell
• Abstract summary: We develop a protocol for fast and robust magnon transport in a one-dimensional spin chain. We show that a sharp transition exists between regions in which the protocol is effective and when it breaks down, giving rise to a speed limit for the process.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A protocol for fast and robust magnon transport in a one-dimensional spin chain is devised. Employing an approximate mapping between the chain and a single harmonically trapped particle, we exploit the known analytic control protocols for the latter and adopt them to achieve fast, high-fidelity transport in the chain. We compare the performance with finite time adiabatic protocols, establishing that the designed scheme allows for significantly faster and more stable transport. Furthermore, we show that a sharp transition exists between regions in which the protocol is effective and when it breaks down, giving rise to a heuristic speed limit for the process.

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