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Phys Rev Lett. 2002 Aug 5;89(6):060402. Epub 2002 Jul 22.

Testing statistical bounds on entanglement using quantum chaos.

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Physical Research Laboratory, Navrangpura, Ahmedabad 380009, India.


Previous results indicate that while chaos can lead to substantial entropy production, thereby maximizing dynamical entanglement, this still falls short of maximality. Random matrix theory modeling of composite quantum systems, investigated recently, entails a universal distribution of the eigenvalues of the reduced density matrices. We demonstrate that these distributions are realized in quantized chaotic systems by using a model of two coupled and kicked tops. We derive an explicit statistical universal bound on entanglement, which is also valid for the case of unequal dimensionality of the Hilbert spaces involved, and show that this describes well the bounds observed using composite quantized chaotic systems such as coupled tops.

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