Coherent-state optical qudit cluster state generation and teleportation via homodyne detection

OPTICS COMMUNICATIONS

卷:337

Article

Kim, Jaewan¹  Lee, Juhui¹  Ji, Se-Wan²  Nha, Hyunchul²  Anisimov, Petr M.^3,4  Dowling, Jonathan P.^3,4 

[1] Korea Inst Adv Study, Sch Computat Sci, Seoul 130722, South Korea

[2] Texas A&M Univ Qatar, Dept Phys, Doha, Qatar

[3] Louisiana State Univ, Hearne Inst Theoret Phys, Baton Rouge, LA 70803 USA

[4] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

关键词: Qudit;    Cluster state;    Cross-Kerr;    Teleportation;   

DOI  :  10.1016/j.optcom.2014.07.016

来源: Elsevier

【 摘 要 】

Defining a computational basis of pseudo number states, we interpret a coherent state of large amplitude, vertical bar alpha vertical bar >> d/2 pi, as a qudit - a d-level quantum system - that is an even (meaning same size of amplitudes) superposition of d pseudo number basis states. A pair of such coherent state qudits can be maximally entangled by generalized Controlled-Z operation that is based on cross Kerr nonlinearity, which can be weak for large d. Hence, a coherent state optical qudit cluster state can be prepared by repetitive application of the generalized Controlled-Z operation to a set of coherent states. We thus propose an optical qudit teleportation as a simple demonstration of cluster state quantum computation. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommon.org/licenses/by-nc-nd/3.0/).

【 授权许可】

Free