0207058v3

related topics
{state, states, entangled}
{let, theorem, proof}
{qubit, qubits, gate}
{theory, mechanics, state}
{entanglement, phys, rev}
{observables, space, algebra}
{group, space, representation}

Combinatorial Topology Of Multipartite Entangled States

Roman R. Zapatrin

abstract: With any state of a multipartite quantum system its separability polytope is associated. This is an algebro-topological object (non-trivial only for mixed states) which captures the localisation of entanglement of the state. Particular examples of separability polytopes for 3-partite systems are explicitly provided. It turns out that this characterisation of entanglement is associated with simulation of arbitrary unitary operations by 1- and 2-qubit gates. A topological description of how entanglement changes in course of such simulation is provided.

oai_identifier:
oai:arXiv.org:quant-ph/0207058
categories:
quant-ph
comments:
14 pages, LaTeX2e. Slightly revised version of the poster resented on the International Conference on Quantum Information, Oviedo, Spain, 13-18 July, 2002. To appear in the special issue of Journal of Modern Optics
arxiv_id:
quant-ph/0207058
created:
2002-07-10
updated:
2002-10-22

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