Nonequilibrium Phase Transitions in (1+1)-Dimensional Quantum Cellular Automata with Controllable Quantum Correlations

Gillman, Edward; Carollo, Federico; Lesanovsky, Igor

Abstract

Motivated by recent progress in the experimental development of quantum simulators based on Rydberg atoms, we introduce and investigate the dynamics of a class of (1+1)-dimensional quantum cellular automata. These non-equilibrium many-body models, which are quantum generalisations of the Domany-Kinzel cellular automaton, possess two key features: they display stationary behaviour and non-equilibrium phase transitions despite being isolated systems. Moreover, they permit the controlled introduction of local quantum correlations, which allows for the impact of quantumness on the dynamics and phase transition to be assessed. We show that projected entangled pair state tensor networks permit a natural and efficient representation of the cellular automaton. Here, the degree of quantumness and complexity of the dynamics is reflected in the difficulty of contracting the tensor network.

Citation

Gillman, E., Carollo, F., & Lesanovsky, I. (2020). Nonequilibrium Phase Transitions in (1+1)-Dimensional Quantum Cellular Automata with Controllable Quantum Correlations. Physical Review Letters, 125(10), Article 100403. https://doi.org/10.1103/physrevlett.125.100403

• Journal Article Type: Article
• Acceptance Date: Aug 5, 2020
• Online Publication Date: Sep 3, 2020
• Publication Date: Sep 3, 2020
• Deposit Date: Aug 7, 2020
• Publicly Available Date: Sep 3, 2020
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 125
• Issue: 10
• Article Number: 100403
• DOI: https://doi.org/10.1103/physrevlett.125.100403
• Keywords: General Physics and Astronomy
• Public URL: https://nottingham-repository.worktribe.com/output/4816119