Switching Correlation and Noise Level in Pr(3+):YSO Crystal via Dressing Nonlinear Phase.

Irfan Ahmed,Changbiao Li,Yanpeng Zhang,Zhaoyang Zhang,Feng Wen,Ruimin Wang,Da Zhang

doi:10.1038/srep33568

Irfan Ahmed, Changbiao Li + Show 5 more

Open Access

https://doi.org/10.1038/srep33568

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Journal: Scientific Reports	Publication Date: Sep 21, 2016
Citations: 2	License type: CC BY 4.0

Affiliation: Xi'an Jiaotong University

Abstract

We propose and experimentally demonstrate that the intensity noise correlation and the noise level of intensity-difference and intensity-sum in Stokes and anti-Stokes channel can be well controlled by the relative nonlinear phase in spontaneous parametric four-wave mixing process. By modulating the relative nonlinear phase, including self-phase modulation and cross-phase modulation, switching the correlation into anti-correlation and the relative intensity noise level between the intensity-difference and intensity-sum are realized. We also show that the variation tendencies of the relative intensity noise level and the corresponding intensity fluctuations correlation are in accordance with each other.

Highlights

The experimental preparation, manipulation, and detection of correlated and entangled photon pairs are of great interest for research in fundamental physics and application of quantum information processing[1,2,3]
We demonstrated that the switching the correlation into anti-correlation as well as the relative noise about the intensity-difference noise level (IDNL) and intensity-sum noise level (ISNL) can be realized by modulating the relative nonlinear phase, including self-phase modulation and cross-phase modulation
We focus on the polarization dependences of the intensity fluctuations correlation and the relative intensity noise level between IDNL and ISNL

Summary

Results

To study the role of the relative nonlinear phase played on intensity fluctuations correlation as well as the intensity noise level between the IDNL and ISNL of anti-Stokes and Stokes beams, the dependence of the intensities on time 〈Ii〉+δIi(t) (i =AS, S) are registered. The relative intensity noise level between the IDNL and ISNL of the output beams EAS and ES depends crucially on the correlation functions, the corresponding relative noise level of intensity-difference is switched from. Lower than the intensity-sum to higher than the intensity-sum as polarization modulated from linear to circular This phenomenon can be interpreted from Eqs (2)–(5), where relative nonlinear phase. Relative intensity noise level between IDNL and ISNL and correlation can be switched by polarization of pumping field

Discussion

Methods