Quantum Consensus Dynamics by Entangling Maxwell Demon

• URL: http://arxiv.org/abs/2102.00777v3
• Date: Mon, 4 Oct 2021 14:44:24 GMT
• Title: Quantum Consensus Dynamics by Entangling Maxwell Demon
• Authors: Sungguen Ryu, Rosa L\'opez, Ra\'ul Toral
• Abstract summary: We introduce a Maxwell demon which generates many-body entanglement robustly against bit-flip noises. We derive upper bounds of the entropy reduction and the work extraction rates by demon's operation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We introduce a Maxwell demon which generates many-body entanglement robustly against bit-flip noises, which allows us to obtain quantum advantage. Adopting the protocol of the voter model used for opinion dynamics approaching consensus, the demon randomly selects a qubit pair and performs a quantum feedback control, in continuous repetitions. We derive upper bounds of the entropy reduction and the work extraction rates by demon's operation, which are determined by a competition between the quantum-classical mutual information acquired by the demon and the absolute irreversibility of the feedback control. Our finding of the upper bounds corresponds to a reformulation of the second law of thermodynamics under a class of Maxwell demon which generates many-body entanglement in a working substance.

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