Measurement-induced coherent control of non-Gaussian operations on quantum state preparation

Author

Tang Xubing ; Gao Fang ; Wang Yaoxiong ; Shuang Feng

Author_Institution

Inst. of Intell. Machines, Hefei, China

fYear

2013

Firstpage

7955

Lastpage

7959

Abstract

Quantum state preparation is an essential ingredient in quantum information processing. In this letter, based on quantum coherent control induced by Bell measurement, non-Gaussian operations, namely adding (subtracting) one single photon to (from) Gaussian-like input signal field, has been implemented to generate a single-photon-added and -subtracted coherent (SPASC) superposition state. In order to carry out the coherent control, a specified conceptual experiment apparatus has been proposed. By adjusting beamsplitter reflectivity and parameter gain of χ(2) nonlinear crystal, the ingredients of this superposition state can be manipulated. With the help of quasi-probability distribution Wigner function, the evolution of non-classical properties with two controllable parameters can be visualized for this superposition state. The results show a quantum non-Gaussian superposition state can be generated by the measurement-induced coherent control scheme.

Keywords

photons; quantum theory; statistical distributions; χ(2) nonlinear crystal; Bell measurement; Gaussian-like input signal field; SPASC superposition state; beamsplitter reflectivity; measurement-induced coherent control scheme; nonGaussian operations; nonclassical property evolution; parameter gain; quantum coherent control; quantum information processing; quantum nonGaussian superposition state; quantum state preparation; quasiprobability distribution Wigner function; single-photon-added coherent superposition state; single-photon-subtracted coherent superposition state; superposition state visualization; Crystals; Nonlinear optics; Optical variables measurement; Photonics; Quantum entanglement; Reflectivity; Bell measurement; coherent control; non-Gaussian operations; non-classical;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (CCC), 2013 32nd Chinese

Conference_Location

Xi´an

Type

conf

Filename

6640841