Abstract
I show relations between superposition of macroscopically distinct states and entanglement. These relations lead to the important conclusion that if a state includes superposition of macroscopically distinct states, the state also includes large multipartite entanglement in terms of several measures. Such a multipartite entanglement property also suggests that if a state includes superposition of macroscopically distinct states, a measurement on a single particle drastically changes the state of macroscopically many other particles, as in the case of the -qubit Greenberger- Horne-Zeilinger state.
- Received 24 September 2009
DOI:https://doi.org/10.1103/PhysRevA.81.010101
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