Category: 4. Physics

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  • Mitigation of sulfide adsorption in natural gas by silanized stainless steel: insights from density functional theory

    Mitigation of sulfide adsorption in natural gas by silanized stainless steel: insights from density functional theory

    Sulfur compounds like hydrogen sulfide, methyl mercaptan, ethyl mercaptan, and thionyl carbon pose safety risks1,2, induce pipeline corrosion, and impacting on natural gas quality. Consequently, monitoring these compounds throughout the stages of…

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  • Classical simulability of constant-depth linear-optical circuits with noise

    Classical simulability of constant-depth linear-optical circuits with noise

    Linear-optical circuits with single photons

    Consider M-mode linear-optical circuits with N single-photon inputs and arbitrary local measurements. Linear-optical circuits consist of beam-splitter layers, which may be geometrically non-local, i.e.,…

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  • Microscopic theory of polariton group velocity renormalization

    Microscopic theory of polariton group velocity renormalization

    Model system

    We use the Generalized Holstein-Tavis-Cummings (GHTC) Hamiltonian23,24,25,26 to describe N excitons interacting with \({{{\mathcal{M}}}}\) cavity modes, and \(N\gg {{{\mathcal{M}}}}\) in line with typical experimental conditions….

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  • Cavity-enhanced continuous-wave microscopy with potentially unstable cavity length

    Cavity-enhanced continuous-wave microscopy with potentially unstable cavity length

    Cavity parameters

    The cavity length is defined by the 4f requirement to be \(\sim 30\,\text {cm}\). Accounting for the optical path length differences introduced by the lenses results in an actual length of approximately \(30.6\,\text {cm}\). This…

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  • A dual input dual spliced network with data augmentation for robust modulation recognition in communication countermeasures

    A dual input dual spliced network with data augmentation for robust modulation recognition in communication countermeasures

    PET-CGDNN model

    The proposed Parameter Estimation and Transformation-based CNN-GRU Deep Neural Network (PET-CGDNN) model consists of a parameter estimator, a parameter transformer, and a hybrid neural network, as depicted in Fig. 1.

    Fig. 1

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  • Tunable reciprocal and nonreciprocal contributions to 1D Coulomb drag

    Tunable reciprocal and nonreciprocal contributions to 1D Coulomb drag

    Device operation and wires characterization

    A schematic of the vertically-coupled quantum wires devices used in this work is shown in Fig. 1b, with a typical optical image provided (see Supplementary Fig. 1). As the two wires are defined in two…

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  • Supervised learning of the Jaynes–Cummings Hamiltonian

    Supervised learning of the Jaynes–Cummings Hamiltonian

  • Wang, X., Zhao, Y. & Pourpanah, F. Recent advances in deep learning. Int. J. Mach. Learn. Cybernet. 11, 747–750 (2020).

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  • Young, T., Hazarika, D., Poria, S. & Cambria, E. Recent trends in deep…

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  • Quantum-like nonlinear interferometry with frequency-engineered classical light

    Quantum-like nonlinear interferometry with frequency-engineered classical light

    Super-resolution can be explained via the definition of maximally entangled state, that can be written as25:

    $$\begin{aligned} |\psi \rangle = \frac{|N,0\rangle _{ab} + e^{iN\phi }|0,N\rangle _{ab}}{\sqrt{2}}\,. \end{aligned}$$

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