Zeno crossovers in the entanglement speed of spin chains with noisy impurities

• URL: http://arxiv.org/abs/2103.16172v4
• Date: Wed, 5 Oct 2022 13:46:25 GMT
• Title: Zeno crossovers in the entanglement speed of spin chains with noisy impurities
• Abstract summary: Noise averaged entanglement entropy can be used as a proxy for the heating and Zeno regimes. We show that noise averaged entanglement entropy can be used as a proxy for the heating and Zeno regimes.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We use a noisy signal with finite correlation time to drive a spin (dissipative impurity) in the quantum XY spin chain and calculate the dynamics of entanglement entropy of a bipartition of spins, for a stochastic quantum trajectory. We compute the noise averaged entanglement entropy of a bipartition of spins and observe that its speed of spreading decreases at strong dissipation, as a result of the Zeno effect. We recover the Zeno crossover and show that noise averaged entanglement entropy can be used as a proxy for the heating and Zeno regimes. Upon increasing the correlation time of the noise, the location of the Zeno crossover shifts at stronger dissipation, extending the heating regime.

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