Quantum Teamwork for Unconditional Multiparty Communication with Gaussian States

Abstract

We demonstrate the capability of continuous variable Gaussian states to communicate multipartite quantum information. A quantum teamwork protocol is presented according to which an arbitrary possibly entangled multimode state can be faithfully teleported between two teams each comprising many cooperative users. We prove that N-mode Gaussian weighted graph states exist for arbitrary N, that enable unconditional quantum teamwork implementations for any arrangement of the teams. These perfect continuous variable maximally multipartite entangled resources are typical among pure Gaussian states and are unaffected by the entanglement frustration occurring in multiqubit states.

4+2 pages, 2 figures. Published version with appendix

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Cited by in corpus (16)

• Gaussian Quantum Information
• Absolute Maximal Entanglement and Quantum Secret Sharing
• Demonstration of monogamy relations for Einstein-Podolsky-Rosen steering in Gaussian cluster states
• Entangling two distant nanocavities via a waveguide
• Multipartite Entanglement and Frustration
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• Gaussian maximally multipartite entangled states
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• Phase diagram of bipartite entanglement
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• Optical Quantum Computing