A curvature dependent bound for entanglement change in classically chaotic systems
Using the Calogero-Moser model and the Nakamura-Lakshmanan equations of motion for eigenvalues and eigenfunctions associated with a multi-partite quantum system, we prove an inequality between the mean bi-partite entanglement rate of change under the variation of a critical parameter and the level-curvature. This provides an upper bound for the rate of production or destruction of entanglement induced dynamically. We then investigate the dependence of the upper bound on the degree of chaos of the system, which in turn, through the inequality, gives a measure of the stability of the entangled state. Our analytical results are supported by extensive numerical calculations.
entanglement calogero-moser model upper bounds quantum chaos