Demonstration of a Controlled-Phase Gate for Continuous-Variable One-Way 
Quantum Computation

Ukai, Ryuji; Yokoyama, Shota; Yoshikawa, Jun-ichi; van Loock, Peter; Furusawa, Akira

doi:10.1103/PhysRevLett.107.250501

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Demonstration of a Controlled-Phase Gate for Continuous-Variable One-Way Quantum Computation

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van Loock, Peter
van Loock Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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引用

Ukai, R., Yokoyama, S., Yoshikawa, J.-i., van Loock, P., & Furusawa, A. (2011). Demonstration of a Controlled-Phase Gate for Continuous-Variable One-Way Quantum Computation. PHYSICAL REVIEW LETTERS, 107(25):. doi:10.1103/PhysRevLett.107.250501.

引用: https://hdl.handle.net/11858/00-001M-0000-002D-695F-7

要旨

We experimentally demonstrate a controlled-phase gate for continuous variables using a cluster-state resource of four optical modes. The two independent input states of the gate are coupled with the cluster in a teleportation-based fashion. As a result, one of the entanglement links present in the initial cluster state appears in the two unmeasured output modes as the corresponding entangling gate acting on the input states. The genuine quantum character of this gate becomes manifest and is verified through the presence of entanglement at the output for a product two-mode coherent input state. By combining our gate with the recently reported module for single-mode Gaussian operations [R. Ukai et al., Phys. Rev. Lett. 106, 240504 (2011)], it is possible to implement any multimode Gaussian operation as a fully measurement-based one-way quantum computation.