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- W3025398375 abstract "We study quantum information scrambling in spin models with both long-range all-to-all and short-range interactions. We argue that a simple global, spatially homogeneous interaction together with local chaotic dynamics is sufficient to give rise to fast scrambling, which describes the spread of quantum information over the entire system in a time that is logarithmic in the system size. This is illustrated in two tractable models: (1) a random circuit with Haar random local unitaries and a global interaction and (2) a classical model of globally coupled non-linear oscillators. We use exact numerics to provide further evidence by studying the time evolution of an out-of-time-order correlator and entanglement entropy in spin chains of intermediate sizes. Our results pave the way towards experimental investigations of fast scrambling and aspects of quantum gravity with quantum simulators." @default.
- W3025398375 created "2020-05-21" @default.
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- W3025398375 date "2020-09-21" @default.
- W3025398375 modified "2023-10-14" @default.
- W3025398375 title "Minimal Model for Fast Scrambling" @default.
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- W3025398375 doi "https://doi.org/10.1103/physrevlett.125.130601" @default.
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