2023
DOI: 10.1007/jhep05(2023)037
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Charge transport, information scrambling and quantum operator-coherence in a many-body system with U(1) symmetry

Abstract: In this work, we derive an exact hydrodynamical description for the coupled, charge and operator dynamics, in a quantum many-body system with U(1) symmetry. Using an emergent symmetry in the complex Brownian SYK model with charge conservation, we map the operator dynamics in the model to the imaginary-time dynamics of an SU(4) spin-chain. We utilize the emergent SU(4) description to demonstrate that the U(1) symmetry causes quantum-coherence to persist even after disorder-averaging, in sharp contrast to models… Show more

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Cited by 3 publications
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