A simplified version of quantum dynamical entropy is introduced, its growth rate is computed from correlation functions in the thermodynamic limit, and a Planckian bound on the rate is conjectured.
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quant-ph 2years
2025 2verdicts
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Averaging the time-evolution operator over disorder restores permutation symmetry in the effective dynamical map for linear observables, enabling polynomial-scaling simulations of large disordered spin systems via short-time and weak-disorder expansions.
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Planckian bound on quantum dynamical entropy
A simplified version of quantum dynamical entropy is introduced, its growth rate is computed from correlation functions in the thermodynamic limit, and a Planckian bound on the rate is conjectured.
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Exploiting emergent symmetries in disorder-averaged quantum dynamics
Averaging the time-evolution operator over disorder restores permutation symmetry in the effective dynamical map for linear observables, enabling polynomial-scaling simulations of large disordered spin systems via short-time and weak-disorder expansions.