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Characterization of Multipartite Entanglement for One Photon Shared Among Four Optical Modes

2009; American Association for the Advancement of Science; Volume: 324; Issue: 5928 Linguagem: Inglês

10.1126/science.1172260

1095-9203

Scott B. Papp, K. S. Choi, Hui Deng, Pavel Lougovski, S. J. van Enk, H. J. Kimble,

Quantum Computing Algorithms and Architecture

Entanglement Sharing Quantum information processing relies on the ability to generate quantum states, to entangle them, and to send and receive those quantum states reliably across networks. With quantum two-level systems, or qubits, if you want to have a large system (and solve complex problems), there is a fear that the ancillary equipment required to control the system will increase rapidly, perhaps too quickly. The use of multipartite systems, where several quantum states can be accessed in a single component, has been proposed as a solution. Papp et al. (p. 764 ) work with a multipartite system consisting of a single photon shared between four optical modes and show that the degree of entanglement can be controllably tuned. The ability to work with, and control, such entangled multipartite systems should help the development of quantum information processing.