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Fourier modal method and coordinate transformation method under nonclassical electromagnetic boundary condition for the electromagnetism of mesoscale metallic nanostructures
Haitao Liu
https://arxiv.org/abs/2506.22838

Fourier modal method and coordinate transformation method under nonclassical electromagnetic boundary condition for the electromagnetism of mesoscale metallic nanostructures
The optical response of mesoscale metallic nanostructures (MMNSs) with feature sizes down to extreme nanometer scales is largely affected by the nonclassical quantum effects, which can be comprehensively described by the nonclassical electromagnetic boundary condition (NEBC) incorporating surface-response Feibelman d-parameters. Here we report the Fourier modal method (FMM) and the coordinate transformation method (C method) under the NEBC, which are built up by incorporating the NEBC into a re…

Low Temperature Formation of Crystalline VO2 Domains in Porous 1 Nanocolumnar Thin Films for Thermochromic Applications
H. Acosta-Rivera, V. Rico, F. J. Ferrer, T. C. Rojas, R. Alvarez, N. Martin, A. R. Gonzalez-Elipe, A. Palmero
https://arxiv.org/abs/2507.23393

Low Temperature Formation of Crystalline VO2 Domains in Porous 1 Nanocolumnar Thin Films for Thermochromic Applications
The formation of VO2 crystalline domains in amorphous substoichiometric nanocolumnar VOx thin films subjected to an oxidation process at temperatures below 300°C has been studied. It is obtained that values of [O]/[V] above 1.9 lead to the sole formation of V2O5 after oxidation, while values below 1.9 favor the formation of VO2, V3O7 and V2O5 crystalline domains for temperatures as low as 260°C. Moreover, it is found that the adsorption of oxygen and its incorporation into the film network pr…

Hints of noncold dark matter? Observational constraints on barotropic dark matter with a constant equation of state parameter
Yan-Hong Yao, Jian-Qi Liu
https://arxiv.org/abs/2507.00478

Hints of noncold dark matter? Observational constraints on barotropic dark matter with a constant equation of state parameter
This study investigates the potential of a cosmological model termed $Λw$DM, in which a cosmological constant play the role of dark energy and dark matter is barotropic and has a constant equation of state parameter ($w_{\rm dm}$), to address the $S_8$ tension between early- and late- universe observations. By incorporating the latest cosmological datasets -- including Planck Cosmic Microwave Background (CMB), Baryon Acoustic Oscillation (BAO), Ia supernovae (SNe Ia), Redshift Space Distortion…

Nonclassical Photon-Assisted Transport in Superconducting Tunnel Junctions
Matthias H\"ubler, Juan Carlos Cuevas, Wolfgang Belzig
https://arxiv.org/abs/2507.22662 https://

Nonclassical Photon-Assisted Transport in Superconducting Tunnel Junctions
Advances in circuit quantum electrodynamics have enabled the generation of arbitrary nonclassical microwave states and paved the way for addressing novel physics questions. Here, we present a theoretical study of the electrical current in a Josephson tunnel junction interacting with a nonclassical electromagnetic environment. This allows us to generalize classical transport phenomena like photon-assisted tunneling and Shapiro steps to the quantum regime. We predict that the analysis of the supe…

Quantum-enhanced dark matter detection using Schr\"odinger cat states
Pan Zheng, Yanyan Cai, Bin Xu, Shengcheng Wen, Libo Zhang, Zhongchu Ni, Jiasheng Mai, Yanjie Zeng, Lin Lin, Ling Hu, Xiaowei Deng, Song Liu, Jing Shu, Yuan Xu, Dapeng Yu
https://arxiv.org/abs/2507.23538

Quantum-enhanced dark matter detection using Schrödinger cat states
Quantum metrology enables sensitive dark matter detection, particularly using nonclassical states, such as Schrödinger cat states featuring sub-Planck interference structures in microwave cavities. Here, we report the first experimental application of four-component Schrödinger cat states within a high-quality superconducting microwave cavity to detect dark photons, a potential dark matter candidate. We demonstrate an 8.1-fold enhancement in the signal photon rate and constrain the dark photo…

Engineering Magnetization with Photons: Nanoscale Advances in the Inverse Faraday Effect for Metallic and Plasmonic Systems
Chantal Hareau, Xingyu Yang, Maria Sanz, Matthew Sheldon, Mathieu Mivelle
https://arxiv.org/abs/2506.23515

Engineering Magnetization with Photons: Nanoscale Advances in the Inverse Faraday Effect for Metallic and Plasmonic Systems
The inverse Faraday effect, the ability of light to act as a source of magnetism, is a cornerstone of modern ultrafast optics. Harnessing this effect at the nanoscale promises to transform data storage and spintronics, yet its predictive understanding remains elusive. This review synthesizes recent progress in engineering the IFE within plasmonic architectures. We bridge the theoretical foundations, from classical drift current models to quantum descriptions, with the latest experimental milest…

Spintronic temperature nanosensor based on the resonance response of a skyrmion-hosting magnetic tunnel junction
Michail Lianeris, Davi Rodrigues, Andrea Meo, Dimitris Kechrakos, Anna Giordano, Mario Carpentieri, Giovanni Finocchio, Riccardo Tomasello
https://arxiv.org/abs/2507.23430

Spintronic temperature nanosensor based on the resonance response of a skyrmion-hosting magnetic tunnel junction
The increasing need for efficient thermal management in nanoelectronics requires innovative thermal sensing solutions, as conventional sensors often exhibit nonlinear responses, low sensitivity, and complex calibration. We predict a temperature dependence in the response of existing skyrmion based spintronic diodes and propose their use as nanoscale thermal sensors. These devices leverage magnetic skyrmions topologically protected spin textures known for their robustness, nanoscale dimensions, …

Strain effects on the fluctuation properties in noncollinear antiferromagnets: a first-principles and macrospin-based study
Mohammad M. Rahman, Farzad Mahfouzi, Matthew W. Daniels, Mark D. Stiles
https://arxiv.org/abs/2507.22275

Strain effects on the fluctuation properties in noncollinear antiferromagnets: a first-principles and macrospin-based study
We present a theoretical investigation of epitaxial strain effects on the magnetic fluctuation properties of Mn$_3$Sn noncollinear antiferromagnets. Employing density functional theory (DFT), we uncover significant strain-induced modifications to key magnetic parameters, including magnetic anisotropy and both bilinear and biquadratic exchange interactions. Our findings reveal that the biquadratic exchange, often neglected, plays a crucial role in defining the magnetic energy landscape and its r…

Measure of entanglement production by quantum operations
V. I. Yukalov, E. P. Yukalova
https://arxiv.org/abs/2507.23366 https://arxiv.org/pdf/2507.23366

Measure of entanglement production by quantum operations
A measure of entanglement production by quantum operations is suggested. This measure is general, being valid for operations over pure states as well as over mixed states, for equilibrium as well as for nonequilibrium processes. The measure of entanglement production satisfies all properties typical of such a characteristic. Systems of arbitrary nature can be treated, described by field operators, spin operators, or any other operators, which is realized by defining generalized correlation matr…

Quantum Phase Sensitivity with Generalized Coherent States Based on Deformed su(1,1) and Heisenberg Algebras
N. E. Abouelkhir, A. Slaoui, R. Ahl Laamara
https://arxiv.org/abs/2508.21779

Quantum Phase Sensitivity with Generalized Coherent States Based on Deformed su(1,1) and Heisenberg Algebras
We investigate the phase sensitivity of a Mach Zehnder interferometer using a special class of generalized coherent states constructed from generalized Heisenberg and deformed su(1,1) algebras. These states, derived from a perturbed harmonic oscillator with a four parameter deformed spectrum, provide enhanced tunability and nonclassical features. The quantum Fisher information and its associated quantum Cramér-Rao bound are used to define the fundamental precision limits in phase estimation. W…