Abstract of a paper by Guillaume Aubrun, Stanislaw J. Szarek and Deping Ye
This is an announcement for the paper "Entanglement thresholds for random induced states" by Guillaume Aubrun, Stanislaw J. Szarek and Deping Ye. Abstract: For a random quantum state on $H=C^d \otimes C^d$ obtained by partial tracing a random pure state on $H \otimes C^s$, we consider the whether it is typically separable or typically entangled. We show that a threshold occurs when the environment dimension $s$ is of order roughly $d^3$. More precisely, when $s \leq cd^3$, such a random state is entangled with very large probability, while when $s \geq Cd^3 \log^2 d$, it is separable with very large probability (here $C,c>0$ are appropriate effectively computable universal constants). Our proofs rely on random matrices, classical convexity, high-dimensional probability and geometry of Banach spaces. Our methods work also for multipartite systems and for "unbalanced" systems such as $C^{d} \otimes C^{d'}$, $d \neq d' $. Archive classification: quant-ph math.FA math.PR Report Number: Mittag-Leffler-2010fall Remarks: 29 pages Submitted from: szarek@cwru.edu The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/1106.2264 or http://arXiv.org/abs/1106.2264
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alspach@math.okstate.edu