Propagation of Quantum Squeezed Radiation in PT- Symmetric Rydberg Atomic Structures

Amooghorban

Moravvej-Farshi

2022

J. Opt.

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We investigate the propagation of a normally incident squeezed coherent state of light through dispersive non-Hermitian optical bilayers, particularly at a frequency that the bilayers hold parity-time (PT) symmetry. To check the realization of PT-symmetry in quantum optics, we reveal how dispersion and loss/gain-induced noises and thermal effects in such bilayers can affect quantum features of the incident light, such as squeezing and sub-Poissonian statistics. The numerical results show thermally-induced noise at room temperature has an insignificant effect on the propagation properties in these non-Hermitian bilayers. Moreover, tuning the bilayers’ loss/gain strength, we show that the transmitted squeezed coherent states through the structure can retain to some extent their nonclassical characteristics, specifically for the frequencies far from the emission frequency of the gain layer. Furthermore, we demonstrate, only below a critical value of gain, quantum optical effective medium theory can correctly predict the propagation of quantized waves in non-Hermitian and PT-symmetric bilayers.

Section: The Exact Multilayer Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantum optical analysis of squeezed state of light through dispersive non-Hermitian optical bilayers

Amooghorban

Moravvej-Farshi

2022

J. Opt.

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“…To illustrate the effects of the bilayer structure in quantum optics, we consider the specific case (same as those used in [13]- [19]) that satisfy the necessary condition for the PT-symmetry system in ( 1)-( 2): ω0l=ω0g=1 PHz, γl=γg=0.067 PHz, and ε 0l =ε 0g =2 i.e., (Δε=0), we achieve PTsymmetry at ωPT/ω 0g =1 for arbitrary values of |αg|=αl. The thickness of the loss/gain slab along the z-direction is 10 nm.…”

Section: The Second-order Coherencementioning

confidence: 99%

Effects of Non-Hermitian Bilayer Medium on the Second-Order Coherence of the Transmitted Coherent and Number States

Amooghorban²,

Moravvej-Farshi³

2021

IJOP

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We investigate the propagation of the normal two-photon number state and coherent state of light through a dispersive non-Hermitian bilayer structure composed of gain and loss layers, particularly at a discrete set of frequencies for which this structure holds PTsymmetric. We reveal how dispersion and gain/loss-induced noises in such a bilayer structure affect the antibunching property of the incident light. For this purpose, we have calculated the second-order coherence of the output state of the bilayer. Varying the loss layer coefficient, we show that the antibunching property of the incident light only retains to some extent, for small values of loss coefficient for the transmitted number state.

“…(3), the average flux of the noise photons due to the spontaneous emission processes reduces to: for a single-resonance PT-symmetric bilayer of Lorentz type, as an example. Hence, the complex permittivity of the gain/loss (g/l) slab can be written as [8],…”

Section: Quadrature Squeezingmentioning

confidence: 99%

Quantum Squeezed Light Propagation in an Optical Parity-Time (PT)-Symmetric Structure

Amooghorban

Moravvej-Farshi

2019

IJOP

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We investigate the medium effect of a parity-time (PT)-symmetric bilayer on the quantum optical properties of an incident squeezed light at zero temperature (T=0 K). To do so, we use the canonical quantization approach and describe the amplification and dissipation properties of the constituent layers of the bilayer structure by Lorentz model to analyze the quadrature squeezing of the outgoing state from the bilayer structure. Our results show that despite the apparent compensation of the losses within the bilayer in the symmetry phase, the outgoing light is no longer squeezed. The results also show that the quantum optical effective medium theory correctly predicts the quantum features of the light outgoing from the PT-symmetric bilayer structure.