Description
Optical parametric amplifiers are known in the literature as a tool for the generation of quantum correlated beams. Forward four-wave mixing (FWM) with gain factors on the order of 10 associated with strong intensity squeezing [1] is behind, for example, the generation of entangled fields [2].
In this work, we explore both the internal and external atomic degrees of freedom to demonstrate the observation of giant gain and parametric oscillation in multiple FWM processes in a sample of cold cesium atoms. The parametric probe-beam amplification exceeds 2000 and is accompanied by the generation of three other beams of equivalent power emitted along the directions satisfying the phase-matching conditions for multiple cascade forward and backward FWM [3, 4].
The quantum correlations among these fields are investigated by combining in-quadrature electronic local oscillators and heterodyne detection, allowing the measurement of the fields' quadratures and the reconstruction of the covariance matrix.
Also, a full Liouville–Maxwell equations calculation in the extended Hilbert space of the internal and external atomic degrees of freedom allows us to obtain, from first principles, the four-wave propagation equations.
[1] C. F. McCormick, A. M. Marino,V.Boyer, and P. D. Lett, Phys. Rev. A 78, 043816 (2008).
[2] V. Boyer, A. M. Marino, R. C. Pooser, and P. D. Lett, Science 321 321, 544 (2008).
[3] J. P. Lopez, A. J. F. de Almeida, D. Felinto, and J. W. R. Tabosa, Opt. Lett. 42, 4474 (2017).
[4] J. P. Lopez, A. M. G. de Melo, and J. W. R. Tabosa, Opt. Lett. , 45, 3490 (2020).
| Presenter name | Gabriel C. Borba |
|---|---|
| How will you attend ICAP-27? | I am planning on in-person attendance |
