On the negativity of random pure states

Details On the negativity of random pure states On the negativity of random pure states

2010-04-08

arxiv.org/abs/1004.1317v1

Phys. Rev. A, 81, 052312 (2010)

Physics

Quantum Physics

15 pages, 2 figures

Scientific paper

This paper deals with the entanglement, as quantified by the negativity, of pure quantum states chosen at random from the invariant Haar measure. We show that it is a constant (0.72037) multiple of the maximum possible entanglement. In line with the results based on the concentration of measure, we find evidence that the convergence to the final value is exponentially fast. We compare the analytically calculated mean and standard deviation with those calculated numerically for pure states generated via pseudorandom unitary matrices proposed by Emerson et. al. [Science, 302, 3098, (2003)]. Finally, we draw some novel conclusions about the geometry of quantum states based on our result.

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