Global entanglement in multiparticle systems

Details Global entanglement in multiparticle systems Global entanglement in multiparticle systems

2001-08-23

arxiv.org/abs/quant-ph/0108104v1

Physics

Quantum Physics

9 pages, plain TeX, 1 PostScript figure included with epsf.tex (ignore the under/overfull \vbox error messages); for related w

Scientific paper

We define a polynomial measure of multiparticle entanglement which is scalable, i.e., which applies to any number of spin-1/2 particles. By evaluating it for three particle states, for eigenstates of the one dimensional Heisenberg antiferromagnet and on quantum error correcting code subspaces, we illustrate the extent to which it quantifies global entanglement. We also apply it to track the evolution of entanglement during a quantum computation.

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