Eur. Phys. J. D (2016) 70: 112
https://doi.org/10.1140/epjd/e2016-70075-y

Regular Article

Universal weighted graph state generation with the cross phase modulation

Fujian Provincial Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, P.R. China

^a e-mail: qlin@hqu.edu.cn

Received: 4 February 2016
Received in final form: 28 March 2016
Published online: 19 May 2016

Abstract

We introduce an architecture of cascade CZ^θ operation for conveniently generating universal weighted graph state. The entanglement bonds between dependent or independent single photons can be created efficiently with only one ancilla single photon. The generation is scalable for universal weighted graph states, including arbitrary two-dimensional or three-dimensional weighted graph states. Moreover, the generation is flexible, including that the controlled phase shift θ between each pair of single photons can be different, the traces of the ancilla single photon walking is not fixed, and the prior entangled states are not required.