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Journal of Physics Communications
Scopus
ISSN 2399-6528 · IOP Publishing · 229 artikel di indeks
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Artikel Jurnal
Revisiting contact potential difference in electrostatic force microscopy
Understanding the tip–substrate interaction in Electrostatic Force Microscopy (EFM) is essential for the quantitative analysis of experimental data. In this work, the role of the contact potential difference ( V _CPD ) between tip and substrate, both experimentally and theoretically, is…
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Doping profile engineering and trap dynamics in perovskite solar cells: a capacitance-based simulation study
This study presents a comprehensive simulation-based analysis of how doping profile engineering influences the performance of perovskite solar cells. Three different doping (graded) profiles viz., linear grading, exponential grading and parabolic grading were investigated using SCAPS-1D to analyse…
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Tunable absorption spectrum splitting in a pulse-driven three-level system
When a two-level system is driven on resonance by a strong incident field, its emission spectrum is characterized by the well-known Mollow triplet. If the absorption from the excited state, in this continuously driven two-level system, to a third, higher energy level, is probed by a weak field, the…
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Non-adiabatic geometric phases in discrete time quantum walks
We present an analytical framework to investigate phase dynamics in discrete-time quantum walks, with a focus on geometric phases in both single- and two-particle systems. Leveraging the Cayley-Hamilton theorem, we construct the evolution operator in momentum space and derive exact closed-form…
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Inequality between optical and DC conductivities in simple metals
On the basis of the generalized Drude formulae derived from Wigner operator equations for quantum electron–ion plasmas, it is proven analytically that the low-frequency limit of the optical conductivity is lower than the DC conductivity for simple metals under the condition of weak electron–ion…
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Quantification of temperature dependence of forces involved in cytoplasmic streaming using optical tweezers
Cytoplasmic streaming is a phenomenon observed in plants where the circulation of cellular components occurs around the central vacuole. It is crucial for the spatio-temporal distribution of organelles in plant cells and thus has an important role in plant growth. It has been found that enhanced…
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Speed estimation from a single image of a disc: theory
We develop an approach to estimate the tangential speed of the edge of a rotating disc using a single image captured from a moving camera. The only dimensional information required for the estimate is the velocity of the camera relative to the ground. Notably, the size of the disc is not used, and…
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The entanglement evolution of the quantum optical systems
In this paper, we apply the Thermofield Dynamics (TFD) method to transform a quantum optical master equation into a Schrödinger-like equation for an arbitrary initial condition, making it a preferred approach for solving open quantum system problems. Entanglement and quantum mutual information are…
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Observation quality control using a robust ensemble time-localized H-infinity filter with measurements corrupted by strong outliers
Accurate state estimation in complex dynamical systems is crucial for understanding and predicting nonlinear physical processes. However, conventional ensemble-based Kalman filtering methods, which rely on ${\mathscr{L}}$ 2-norm updates, are highly sensitive to outliers and gross observational…
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Pump effect on solitary waves in the unsaturated regime of Erbium-doped fiber amplifiers
The propagation dynamics of solitons in Erbium-Doped Fiber Amplifiers (EDFAs) is significantly influenced by pump power, particularly within the unsaturated signal regime. Establishing this relationship is critical for the design of ultrafast signal processing systems and mode-locked fiber lasers…
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Development of hybrid quantum classifiers for realistic classification tasks
Hybrid quantum machine learning combines classical minimization with parameterized quantum circuits, enabling powerful learning models even on near-term quantum hardware. This work presents an evaluation of hybrid quantum machine learning classifiers using the data re-uploading framework across…
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Interference loss as redistribution of bright and dark mode amplitudes in quanton-detector entanglement
We introduce a generalized algebraic framework for the bright–dark mode decomposition of a two-path quantum interferometer entangled with a path-sensitive detector. Within this formulation, the loss of interference visibility is reinterpreted not as a destruction of quantum coherence, but as a…
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Wave kinetic equation for Zakharov equation with stochastic dissipation and forcing
We develop a generalized wave kinetic theory for weakly nonlinear wave systems with stochastic dissipation. Starting from the Zakharov equation with multiplicative Gaussian noise, interpreted in the Itô sense, we derive the statistical evolution of the wave action using action–angle variables and a…
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D-index: an energy-based diagnostic for detecting dynamical transitions in nonstationary time series
Detecting and localizing transient regime transitions in nonlinear and nonstationary time series remains a major challenge in monitoring and forecasting the behaviour of complex natural and engineered systems. In this work, we formalize and evaluate the D-index (Dynamic Energy Redistribution Index)…
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A canonical entropy-based multiscale decomposition of functions
We introduce a canonical entropy-based multiscale decomposition of nonnegative $L^1$ functions that yields both physically meaningful approximations and an injective representation. The construction produces a recursive partition of the domain-organized as a Hahn tree-in which each region carries…
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Restricted Boltzmann machines in physics: concepts, theories and applications
A restricted Boltzmann machine (RBM) is a two-layer neural-network machine-learning model comprising a visible layer that represents observed data and a hidden layer that captures correlations among the visible units. Rooted in ideas from statistical mechanics, RBMs provide a probabilistic…
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Biaxial tensile strain enhances quantum capacitance of 1H and 1T-NbSe2 monolayer: insights from density functional theory calculations
The effect of biaxial strain on the quantum capacitance of two-dimensional $\mathrm{NbSe_2}$ was investigated via density functional theory calculations. Its two known polytypes, 1H and 1T, were found to have metallic electronic band structure under the Perdew–Burke–Ernzerhof exchange-correlation…
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Mapping a general diffusion model with auxiliary conditions
The current paper describes new transformations that determines all possible ways that the partial differential equation, $u_t = \sigma^2x^ju_{xx}+g(x,t)u,$ becomes the heat transfer equation. Typically, the approach contains unknown functions of integration, which can be obtained by specific…
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Dewi-Kadita: a python library for idealized fish schooling simulation with entropy-based diagnostics
Collective motion in fish schools exemplifies emergent self-organization, yet computational tools for simulating these dynamics remain fragmented. We present Dewi-Kadita , an open-source Python library implementing the three-dimensional Couzin zone-based model with comprehensive entropy diagnostics…
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Impossible weak values
Weak values characterize quantum systems that are both pre- and post-selected. Such systems are described by two wavefunctions, the overlap of which defines the success probability of the experiment. In weak value theory, it is usually assumed that the weak value does not exist for zero-overlapping…