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انجمن اپتیک و فوتونیک ایران

The Quantum Optic Effect of the two-Layer PT Symmetric on an Incident Quantum Squeezed Light

Elnaz Pilehvar, Ehsan Amooghorban, Mohammad Kazem Moravvej‐Farshi

Published Mar 10, 2019• 0 citations
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Quantum optical analysis of squeezed state of light through dispersive non-Hermitian optical bilayers

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Abstract 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.

arXiv:2109.10631•Journal of Optics•Dec 23, 2021•8 citations
In this paper, we investigate the dispersion and medium effects of non-Hermitian bilayer structures consisting of gain and loss layers on the squeezing property of an obliquely incident squeezed light for s- and p-polarized light, in particular at a discrete set of frequencies for which these structures hold PT-symmetric. For this purpose, we calculate the quadrature squeezing of the output state using the QOEMT. The results show although the squeezing property of the output light is retained for the incident frequency farther from the emission frequency of the gain layer, the output light is not squeezed in the PT-symmetric phase.
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.
Abstract 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.