On the negativity of random pure states

Abstract

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.

15 pages, 2 figures

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• A Concise Formula for Generalized Two-Qubit Hilbert-Schmidt Separability Probabilities
• Average skew information-based coherence and its typicality for random quantum states
• Quantum correlations in qutrit-qutrit systems under local quantum noise channels
• Multi-partite analysis of average-subsystem entropies
• Measurement-invisible quantum correlations in scrambling dynamics