A5048908227- Black Holes and Theoretical Physics
- Noncommutative and Quantum Gravity Theories
- Quantum Mechanics and Applications
- Cosmology and Gravitation Theories
- Quantum Electrodynamics and Casimir Effect
- Semiconductor Quantum Structures and Devices
- Quantum Mechanics and Non-Hermitian Physics
- Terahertz technology and applications
- Gyrotron and Vacuum Electronics Research
- Food Security and Health in Diverse Populations
- Quantum and electron transport phenomena
- COVID-19 Clinical Research Studies
- Particle Accelerators and Free-Electron Lasers
- Market Dynamics and Volatility
- Particle accelerators and beam dynamics
- SARS-CoV-2 and COVID-19 Research
- Drug-Induced Hepatotoxicity and Protection
- Galaxies: Formation, Evolution, Phenomena
- Nonlinear Waves and Solitons
- Gastrointestinal disorders and treatments
- Sleep and related disorders
- Pancreatitis Pathology and Treatment
- Quantum Information and Cryptography
- Solar and Space Plasma Dynamics
- Hepatitis C virus research
Iran University of Medical Sciences
2021-2024
University of Kashan
2016-2023
Institute for Advanced Studies in Basic Sciences
2006-2009
We construct the most general physically admissible positive-definite inner product on space of Proca fields. Up to a trivial scaling this defines five-parameter family Lorentz invariant products that we use genuine Hilbert for quantum mechanics If identify generator time translations with Hamiltonian, obtain unitary system describes first-quantized fields and does not involve conventional restriction positive-frequency provide rather comprehensive analysis system. In particular, examine...
Abstract We study the properties of complex network for solar proton flux (SPF) at six integral energy channels (>1, >5, >10, >30, >50, and >100 MeV). construct a growing visibility based on SPF time series each channel, which observed by Geostationary Operational Environmental Satellites from April 14, 2010 to May 9, 2018. The clustering coefficient values networks are much larger than those equivalent random network. logarithmic behavior characteristic path length refers...
Exposed to a strong electromagnetic field, two-level system with broken inversion symmetry radiates at the Rabi frequency ΩR. This can be used generate terahertz waves [Phys. Rev. Lett.102, 023601 (2009)PRLTAO0031-900710.1103/PhysRevLett.102.023601]. We show that composed of two tunneling-coupled asymmetric systems (ξ1−ξ2)2+ΩR2, where energies ℏξ1 and ℏξ2 characterize tunneling interaction. opens possibility tuning spectrum in considerable range. also for particular amplitudes driving...
Pancreatic duct (PD) dilation could be presented in both benign and malignant diseases. Endoscopic ultrasonography (EUS) is a sensitive modality that provides structural assessment tissue sampling. This study aims to explore the importance of PD as potential indicator related various pancreatobiliary pathologies identified via EUS.
For free Klein-Gordon fields, we construct a one-parameter family of conserved current densities $J_a^μ$, with $a\in(-1,1)$, and use the latter to yield manifestly covariant expression for most general positive-definite Lorentz-invariant inner product on space solutions equation. Employing recently developed method constructing Hilbert observables then obtain probability density ${\cal J}_a^μ$ localization field in space. We show that nonrelativistic limit both $J_a^μ$ tend particle space,...
Abstract In modern particle accelerators with ultra-low emittance, the vacuum chambers are designed based on Non-Evaporable Getter (NEG)-coated chambers. The thickness of NEG coating plays a critical role in dynamic beam effects. So, this paper, longitudinal and transverse impedance copper chamber coated investigated, effects over wide range frequencies have been studied. A good selection layer could minimize impedance. numerical results work show that be minimal selecting about 1 μm.
Introduction: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) infection and treatment are significant health organizations’ concerns worldwide. Although there is no proven drug license against the virus, a variety of components have under investigation. Objectives: In this regard, present study was intended to evaluate consequences Sovodak (sofosbuvir/ daclatasvir) in COVID-19 patients compared with Kaletra (lopinavir/ritonavir). Patients Methods: This conducted as randomized...
In a magnetized plasma, both the transverse and longitudinal Alfvén waves carry an average energy density that, for each mode of oscillation, resembles classical harmonic oscillator with unit mass angular frequency that depends on background magnetic field plasma density. We employ this fact to introduce pair canonical variables underlying system, then use quantization procedure express wave velocity (or corresponding displacement vector) in terms creation annihilation operators. thus...
We investigate Schwinger pair creation of charged scalar particles from a time-dependent electric field background in (1+3)-dimensional de Sitter spacetime. Since the field's equation motion has no exact analytical solution, we employ emph{Olver's uniform asymptotic approximation method} to find its approximate solutions. Depending on value $E$, and particle's mass $m$, wave vector $bfk$, two turning points, whose different natures (real, complex, or double) lead production probability. More...