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Single-Particle Entanglement Dynamics in Complex Systems
Devanshu Shekhar1, Pragya Shukla1
1Department of Physics, Indian Institute of Technology, Kharagpur 721302, West Bengal, India.
None:
We analyze the effect of varying system conditions on the single-particle entanglement entropy for an arbitrary eigenstate of a complex system that can be described by a multiparametric Gaussian ensemble. Our theoretical analysis leads to the identification of a single functional of the system parameters that governs the entropy dynamics. This reveals a sensitivity of the entropy to collective information content, characterized by the functional, instead of the individual system details. The functional can further be used to identify the universality classes as well as a deep web of connection underlying different quantum states.
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