Open AccessDemonstration of CNOT gate with Laguerre Gaussian beams via four-wave mixing in atom vapor
Author(s) -
Mingtao Cao,
Ya Jun Yu,
Liyun Zhang,
Fengjuan Ye,
Yunlong Wang,
Dong Wei,
Pei Zhang,
Weihua Guo,
Shougang Zhang,
Hong Gao,
Fuli Li
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.020177
Subject(s) - controlled not gate , physics , four wave mixing , atomic physics , optics , topology (electrical circuits) , nonlinear optics , quantum mechanics , quantum gate , laser , qubit , quantum , mathematics , combinatorics
We present an experimental study of controlled-NOT (CNOT) gate through four-wave mixing (FWM) process in a Rubidium vapor cell. A degenerate FWM process in a two level atomic system is directly excited by a single diode laser, where backward pump beam and probe beam are Laguerre Gaussian mode. By means of photons carrying orbital angular momentum, we demonstrate the ability to realize CNOT gate with topological charges transformation in this nonlinear process. The fidelity of CNOT gate for a superposition state with different topological charge reaches about 97% in our experiment.