Noise-induced quantum synchronization

• URL: http://arxiv.org/abs/2206.02456v2
• Date: Sun, 18 Dec 2022 16:50:55 GMT
• Title: Noise-induced quantum synchronization
• Authors: Finn Schmolke, Eric Lutz
• Abstract summary: We show that noise applied to a single spin suffices to reach stable (anti)synchronization. We additionally determine the optimal noise amplitude that leads to the fastest synchronization along the chain.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Synchronization is a widespread phenomenon in science and technology. We here study noise-induced synchronization in a quantum spin chain subjected to local Gaussian white noise. We demonstrate stable (anti)synchronization between the endpoint magnetizations of a quantum $XY$ model with transverse field of arbitrary length. Remarkably, we show that noise applied to a single spin suffices to reach stable (anti)synchronization, and demonstrate that the two synchronized end spins are entangled. We additionally determine the optimal noise amplitude that leads to the fastest synchronization along the chain, and further compare the optimal synchronization speed to the fundamental Lieb-Robinson bound for information propagation.

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