Quasidistribution of phases in Raman process with weak and strong pumps

Thapliyal, Kishore; Peřina, Jan

doi:10.1088/1402-4896/ab5316

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…where i = 1 for j = d and i = 2 for j = b. It clearly shows that the general solution used here is modulated with sinc function of the frequency detuning parameter [38,39]. Consequently, the present solution and corresponding results are applicable to a relatively long length of the optical coupler in comparison to the corresponding short-length solution.…”

Section: Discussionmentioning

confidence: 67%

Interplay between quantum Zeno and anti-Zeno effects in a nondegenerate hyper-Raman nonlinear optical coupler

Das¹,

Thapliyal

Sen

et al. 2021

Phys. Rev. A

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The effect of the presence of two probe waveguides on the dynamics of hyper-Raman processes is studied in terms of quantum Zeno and anti-Zeno effects. Specifically, the enhancement (diminution) of the evolution of the hyper-Raman processes due to interaction with the probe waveguides via evanescent waves is viewed as quantum Zeno (anti-Zeno) effect. We considered the two probe waveguides interacting with only one of the optical modes at a time. For instance, as a specific scenario, it is considered that the two non-degenerate pump modes interact with each probe waveguide linearly while Stokes and anti-Stokes modes do not interact with the probes. Similarly, in another scenario, we assumed both the probe waveguides interact with Stokes (anti-Stokes) mode simultaneously. The present results show that quantum Zeno (anti-Zeno) effect is associated with phasematching (mismatching). However, we did not find any relation between the presence of the quantum Zeno effect and antibunching in the bosonic modes present in the hyper-Raman processes.

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Section: Discussionmentioning

confidence: 67%

Interplay between quantum Zeno and anti-Zeno effects in a nondegenerate hyper-Raman nonlinear optical coupler

Das¹,

Thapliyal

Sen

et al. 2021

Phys. Rev. A

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“…These efforts motivated several generalization of the Raman process investigated over the years. [8][9][10] More recently a set of experiments investigated these correlations for different Raman active media. [11][12][13] Along the same lines, Raman scattered light from diamond is shown to exhibit the Bell nonlocal correlations.…”

Section: Introductionmentioning

confidence: 99%

Stokes and anti-Stokes photon-pair generation in Raman scattering

Thapliyal

Peřina

2022

22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics

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Raman scattering as a candidate for photon-pair generation is explored recently both theoretically and experimentally. Here, we systematically analyze the Stokes-anti-Stokes photon-pair generation in Raman scattering, akin signal-idler photon-pair emission in the spontaneous parametric down conversion, to obtain suitable conditions for photon-pair generation. Non-zero mean phonon number and losses in the phonon mode are observed to be relevant parameters in this context in addition to the Raman active material properties and pump power. Specifically, the Raman active materials with stronger anti-Stokes coupling compared to the Stokes coupling constant are suitable for photon-pair generation. Ideal Stokes-anti-Stokes photon-pair generation is possible even for non-zero thermal phonons provided that the phonon losses are negligible. Here, we characterized the performance of photon-pair generation using noise-reduction parameter in detail. We also discuss the effect of phonon losses on the observed non-classical features.

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“…The quantum theory of the Raman process was introduced in [16] and the generation of several types of the nonclassical states was discussed over the time (for the review, see [17,18]). Recently, the correlations between the optical and phonon modes both at resonance and out-of resonance, as well as the generalization of the Raman process to the hyper-Raman process have been investigated [19][20][21]. The fields in the Raman process were experimentally investigated in inelastic scattering of the laser light from water [22], Rb vapors [23] and diamond [24].…”

Section: Introductionmentioning

confidence: 99%

Ideal pairing of the Stokes and anti-Stokes photons in the Raman process

Thapliyal,

Perina

2021

Preprint

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A quantum model of the Raman process with the independent Stokes and anti-Stokes nonlinear interactions is developed to study nonclassical correlations between the photons in the Stokes and anti-Stokes fields. The role of the laser pump amplitude, the ratio of the Stokes and anti-Stokes coupling constants and the population and losses of the vibrational mode in forming the correlations is elucidated. The g (2) intensity cross-correlation function, noise-reduction-factor, two-mode principal squeezing variance, logarithmic negativity, non-classicality depth, steering parameter and the Bell parameter are analyzed side-by-side to shed light to the correlations between the Stokes and anti-Stokes fields. Conditions for having the Stokes and anti-Stokes fields composed of only photon pairs, similarly as it occurs in twin beams in parametric down-conversion, are revealed. They allow for nonzero mean thermal phonon numbers.

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Quasidistribution of phases in Raman process with weak and strong pumps

Cited by 5 publications

References 25 publications

Interplay between quantum Zeno and anti-Zeno effects in a nondegenerate hyper-Raman nonlinear optical coupler

Interplay between quantum Zeno and anti-Zeno effects in a nondegenerate hyper-Raman nonlinear optical coupler

Stokes and anti-Stokes photon-pair generation in Raman scattering

Ideal pairing of the Stokes and anti-Stokes photons in the Raman process

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