Multipartite Entanglement and Quantum State Exchange

Abstract

We investigate multipartite entanglement in relation to the theoretical process of quantum state exchange. In particular, we consider such entanglement for a certain pure state involving two groups of N trapped atoms. The state, which can be produced via quantum state exchange, is analogous to the steady-state intracavity state of the subthreshold optical nondegenerate parametric amplifier. We show that, first, it possesses some 2N-way entanglement. Second, we place a lower bound on the amount of such entanglement in the state using a novel measure called the entanglement of minimum bipartite entropy.

12 pages, 4 figures

References in corpus (3)

• Global entanglement in multiparticle systems
• Bell's theorem for general N-qubit states
• An entanglement monotone derived from Grover's algorithm

Cited by in corpus (10)

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• Determining lower bounds on a measure of multipartite entanglement from few local observables
• Superposition of macroscopically distinct states means large multipartite entanglement
• Quantifying genuine tripartite entanglement by reshaping the state
• Dynamics of genuine multipartite correlations in open quantum systems
• A geometric formulation to measure global and genuine entanglement in three-qubit systems
• Chemical bonding concepts emerge naturally from maximally entangled atomic orbitals