Entangled light in transition through the generation threshold
Abstract
We investigate continuous variable entangling resources on the base of two-mode squeezing for all operational regimes of a nondegenerate optical parametric oscillator with allowance for quantum noise of arbitrary level. The results for the quadrature variances of a pair of generated modes are obtained by using the exact steady-state solution of Fokker-Planck equation for the complex P-quasiprobability distribution function. We find a simple expression for the squeezed variances in the near-threshold range and conclude that the maximal two-mode squeezing reaches 50% relative to the level of vacuum fluctuations and is achieved at the pump field intensity close to the generation threshold. The distinction between the degree of two-mode squeezing for monostable and bistable operational regimes is cleared up.
Cite
@article{arxiv.quant-ph/0304205,
title = {Entangled light in transition through the generation threshold},
author = {G. Yu. Kryuchkyan and L. A. Manukyan},
journal= {arXiv preprint arXiv:quant-ph/0304205},
year = {2007}
}
Comments
7 pages, 4 figures; Content changed: more details added to the discussion. To be published in Phys. Rev. A