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- W2300566921 abstract "We investigate entanglement dynamics and correlations in the quantum Ising model in arbitrary dimensions using a large-coordination-number expansion. We start from the pure paramagnetic regime obtained through zero spin-spin coupling and subsequently turn on the interspin interaction in a time-dependent fashion. We investigate analytically and compare results for both the slow adiabatic onset of the interactions and the fast instantaneous switching. We find that in the latter case of an initial excitation mode a quantum correlation wave spreads through the system, propagating with twice the group velocity of the linearized equilibrium modes. This wave establishes the spatiotemporal regime of entangled quantum properties of the system for time scales shorter than the decoherence time and thus provides an indicator for the ``quantumness'' of the physical system that the specific system models." @default.
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- W2300566921 date "2017-02-08" @default.
- W2300566921 modified "2023-10-17" @default.
- W2300566921 title "Propagation of fluctuations in the quantum Ising model" @default.
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- W2300566921 doi "https://doi.org/10.1103/physrevb.95.064304" @default.
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