On multi-particle entanglement

Details On multi-particle entanglement On multi-particle entanglement

1997-11-13

arxiv.org/abs/quant-ph/9711016v1

Fortsch.Phys. 46 (1998) 567-578

Physics

Quantum Physics

16 pages, LaTeX

Scientific paper

We build, using group-theoretic methods, a general framework for approaching multi-particle entanglement. As far as entanglement is concerned, two states of n spin-1/2 particles are equivalent if they are on the same orbit of the group of local rotations (U(2)^n). We give a method for finding the number of parameters needed to describe inequivalent n spin-1/2 particles states. We also describe how entanglement of states on a given orbit may be characterized by the stability group of the action of the group of local rotations on any point on the orbit.

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