Improved quantum correlations in second harmonic generation with a squeezed pump

Marcellina, E., Corney, J.,F. and Olsen, M.K. (2013) Improved quantum correlations in second harmonic generation with a squeezed pump. Optics Communications, 309 9-14. doi:10.1016/j.optcom.2013.06.063

Author Marcellina, E.
Corney, J.,F.
Olsen, M.K.
Title Improved quantum correlations in second harmonic generation with a squeezed pump
Journal name Optics Communications   Check publisher's open access policy
ISSN 0030-4018
Publication date 2013-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.optcom.2013.06.063
Open Access Status
Volume 309
Start page 9
End page 14
Total pages 6
Place of publication Amsterdam, The Netherlands
Publisher Elsevier BV * North-Holland
Language eng
Subject 2504 Electronic, Optical and Magnetic Materials
2208 Electrical and Electronic Engineering
3107 Atomic and Molecular Physics, and Optics
1606 Political Science
Abstract We investigate the effects of a squeezed pump on the quantum properties and conversion efficiency of the light produced in single-pass second harmonic generation. Using stochastic integration of the two-mode equations of motion in the positive-P representation, we find that larger violations of continuous-variable harmonic entanglement criteria are available for lesser effective interaction strengths than with a coherent pump. This enhancement of the quantum properties also applies to violations of the Reid-Drummond inequalities used to demonstrate a harmonic version of the Einstein-Podolsky- Rosen paradox. This could offer a real practical advantage over increasing the laser intensity, which will eventually damage the crystal, or using a larger crystal, in which case dispersion problems can be accentuated. We find that the conversion efficiency is largely unchanged except for very low pump intensities and high levels of squeezing.
Keyword Entanglement
Quantum information
Second harmonic generation
Squeezed light
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID FT100100515
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 2 times in Scopus Article | Citations
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Created: Sat, 29 Mar 2014, 01:10:22 EST by Dr Murray Olsen on behalf of School of Mathematics & Physics