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Category: 4. Physics

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  • Improving PSNR and computational efficiency in orthogonal ghost imaging

    Improving PSNR and computational efficiency in orthogonal ghost imaging

    We initiate our evaluation process with numerical simulation to compare the image quality produced by the novel approach with the other existing methods. Here, the target object for simulation is an image of \(200\times 200\) pixels with a square…

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  • Strain tuning of optical and thermoelectric properties of monolayer BAs

    Strain tuning of optical and thermoelectric properties of monolayer BAs

    Optical properties

    Figure 1 illustrates the band structure of monolayer BAs along the high symmetric path Γ-M-K-Γ in the Brillouin zone. The results obtained from tight-binding model (shown in blue dashed lines) are compared with those from the…

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  • Critical behavior of Fredenhagen-Marcu string order parameters at topological phase transitions with emergent higher-form symmetries

    Critical behavior of Fredenhagen-Marcu string order parameters at topological phase transitions with emergent higher-form symmetries

    Toric code model and the FM string order parameter

    We consider the toric code model on a square lattice in a field:

    $${H}_{{\rm{TC}}}({h}_{x},{h}_{z})=-\sum _{v}{A}_{v}-\sum _{p}{B}_{p}-{h}_{x}\sum _{e}{X}_{e}-{h}_{z}\sum _{e}{Z}_{e},$$

    …

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  • Tunability of acoustic band gaps using Thue Morse quasiperiodic lateral resonators

    Tunability of acoustic band gaps using Thue Morse quasiperiodic lateral resonators

  • Shin, Y. C. et al. Phononic band gap of a quarter-wave stack for enhanced piezoelectric energy harvesting. Int. J. Mech. Sci. 189, 106003. https://doi.org/10.1016/j.ijmecsci.2020.106003 (2021).

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  • Monitored long-range interacting systems: spin-wave theory for quantum trajectories

    Monitored long-range interacting systems: spin-wave theory for quantum trajectories

    Monitored long-range spin systems

    We consider a system with N spin-s degrees of freedom on a lattice whose sites are labeled by indices i, j, that is subjected to continuous monitoring. For concreteness, we consider the case of weak monitoring…

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  • Author Correction: Spinons in nanographene spin chains

    Author Correction: Spinons in nanographene spin chains

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  • Analytical solutions of the time-fractional symmetric regularized long wave equation using the $$\phi ^{6}$$ model expansion method

    Analytical solutions of the time-fractional symmetric regularized long wave equation using the $$\phi ^{6}$$ model expansion method

    Using the mentioned travelling wave transformation in Eq.1 one will get:

    $$\begin{aligned} \mathfrak {D}^{2 \sigma }_{tt} \mathrel {U}= & a^2 v^2 \mathrel {U}^{\prime \prime }(\epsilon ), \\ \mathrel {V}_{xx}= & p a^2 \mathrel {U}^{\prime \prime…

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  • Inhomogeneous SU(2) symmetries in homogeneous integrable U(1) circuits and transport

    Inhomogeneous SU(2) symmetries in homogeneous integrable U(1) circuits and transport

    Mischievous symmetries

    Any two-qubit gate with U(1) symmetry, i.e., conserving the magnetization \({\sigma }_{1}^{{{{\rm{z}}}}}+{\sigma }_{2}^{{{{\rm{z}}}}}\), can be written as

    $${U}_{1,2}= {{{{\rm{e}}}}}^{-{{{\rm{i}}}}{h}_{1,2}\tau…

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  • JAX-BTE: a GPU-accelerated differentiable solver for phonon Boltzmann transport equations

    JAX-BTE: a GPU-accelerated differentiable solver for phonon Boltzmann transport equations

    Phonon BTE

    The phonon BTE describes the evolution of phonon distributions over time in a system. For a system with a heat source at steady state, the energy-based phonon BTE under the single mode relaxation time approximation can be expressed as

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