Qudit Entanglement
arXiv:quant-ph/0001075 · doi:10.1007/3-540-40894-0_14
Abstract
We consider the separability of various joint states of D-dimensional quantum systems, which we call "qudits." We derive two main results: (i) the separability condition for a two-qudit state that is a mixture of the maximally mixed state and a maximally entangled state; (ii) lower and upper bounds on the size of the neighorhood of separable states surrounding the maximally mixed state for N qudits.
Standard LaTeX, 14 pages, no figures, submitted to Dan Walls Memorial Volume, edited by H. Carmichael, R. Glauber, and M. Scully, to be published by Springer
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