Multipartite entanglement in 2x2xn quantum systems
Journal Article
·
· Physical Review. A
- Department of Physics, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033 (Japan)
We classify multipartite entangled states in the Hilbert space H=C{sup 2}xC{sup 2}xC{sup n} (n{>=}4), for example, the four-qubit system distributed over three parties, under local filtering operations. We show that there exist nine essentially different classes of states, giving rise to a five-graded partially ordered structure, including the celebrated Greenberger-Horne-Zeilinger and W classes of three qubits. In particular, all 2x2xn states can be deterministically prepared from one maximally entangled state, and some applications such as entanglement swapping are discussed.
- OSTI ID:
- 20640576
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 69; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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