The geometric decoherence time marks the earliest breakdown of the monotone relation between logarithmic negativity and Rényi-1/2 entropy under Lindbladian evolution, serving as a dynamical scale for the onset of decoherence.
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Long-range non-Hermitian XX spin chains show enhanced time and size scaling of dynamical quantum Fisher information for parameter estimation compared to short-range and Hermitian cases, with identical scaling at criticality for ground-state probes.
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Geometric Decoherence Time in Lindbladian Dynamics
The geometric decoherence time marks the earliest breakdown of the monotone relation between logarithmic negativity and Rényi-1/2 entropy under Lindbladian evolution, serving as a dynamical scale for the onset of decoherence.
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Quantum-enhanced sensing from the interplay of long-range interactions and non-Hermiticity
Long-range non-Hermitian XX spin chains show enhanced time and size scaling of dynamical quantum Fisher information for parameter estimation compared to short-range and Hermitian cases, with identical scaling at criticality for ground-state probes.