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116 articles for “quantum”
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Research ArticleOpen accessEvery word in the titleOn a Loss of Information in a Transition from Quantum to a Quasi-Classical RegimeAlex GranikBy defining information entropy in terms of the probability density |ψ|2 (ψ is a wave function in the coordinate representation) it is explicitly shown how a loss of quantum information occurs in a transition from a quantum to a quasi-classical regime. …American Journal of Applied Sciences, Vol. 1, Issue 3 · 30 Sep 2004 · 6,860 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleOptimal Dark Current Reduction in Quantum Well 9 µm GaAs/AlGaAs Infrared Photodetectors with Improved DetectivityShahram Mohammad Nejad, Saeed Olyaee, Maryam PourmahyabadiIn this research, an optimization approach is presented to decrease the dark current in GaAs/AlGaAs QWIPs. The dark current noise is reduced by increasing Al density in barriers, decreasing detector dimensions and increasing the periodic length of the structure. In addition, increasing the number of periods can reduce both the dark current and responsivity. Therefore, devices can be optimally designed … …American Journal of Applied Sciences, Vol. 5, Issue 8 · 31 Aug 2008 · 7,190 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleGravity. Origin and Quantum Evolution of the CosmosFrancisco Pavía Alemany, Marcelino Alvarez VillarroyaThe most widely accepted hypothesis regarding the birth and evolution of the Cosmos is the Big Bang theory, which states that, before the beginning, all the current mass energy of the Cosmos was already concentrated within an extremely small, dense, and hot singularity. However, in this article, we propose a new model resulting from physical-mathematical deductions and the discovery of … …Physics International, Vol. 16, Issue 1 · 15 Sep 2025 · 5,334 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEnergy Transformation and the Emergence of Space-Time: A Classical-Quantum Unified FrameworkSanjay BhushanThe complex dynamics of energy transformation is the thrust area of this research study. The idea that the universe's creation is driven by constructive resonant energy transformation offers a compelling way to bridge classical and quantum physics. It suggests that the fundamental nature of reality is rooted in energy and with space, time, matter, and mass emerging from dynamic processes … …Physics International, Vol. 15, Issue 1 · 29 Aug 2024 · 8,414 accessesView PDFCite
Literature ReviewOpen accessEvery word in the titleBook Review: Quantum Field TheoryChristina PospisilThe textbook presents a summary about Quantum Field Theory (QFT) with mathematical details. A wide range of main concepts and additional topics in quantum field theory is displayed in the academic textbook to scientists. Field theory describes and represents phenomena physically and mathematically through forces acting and spreading as field in space. Quantum field theory is constructed and introduced from … …Physics International, Vol. 12, Issue 1 · 22 Feb 2021 · 8,546 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleImpact of the Edges of a Backside Diffusive Reflector on the External Quantum Efficiency of Luminescent Solar Concentrators: Experimental and Computational ApproachMauro Pravettoni, Cristina S. Polo Lòpez, Robert P. KennyLuminescent Solar Concentrators (LSCs) have been proposed in the 1970s as cheap planar concentrators for residential applications and nowadays represent a novel idea with excellent perspectives for building integration photovoltaics. The interest in LSCs has increased in the last years, due to improved stability of luminescent dyes, the introduction of quantum dots and nanorods and the overall reported increase in … …American Journal of Engineering and Applied Sciences, Vol. 9, Issue 1 · 18 Jan 2016 · 8,368 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleQuantum Uncertainty and the Fifth DimensionPaul S. WessonIf the world has an extra dimension, the motion of a particle in spacetime may be slightly modified, producing a correlation between the momentum and position similar to that familiar from the uncertainty relation in quantum mechanics. …Physics International, Vol. 6, Issue 2 · 19 Aug 2015 · 13,271 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleProcess Physics: Emergent Unified Dynamical 3-Space, Quantum and Gravity: A ReviewReginald Thomas CahillExperiments have repeatedly revealed the existence of a dynamical structured fractal 3-space, with a speed relative to the Earth of some 500 km sec-1 from a southerly direction. Experiments have ranged from optical light speed anisotropy interferometers to zener diode quantum detectors. This dynamical space has been missing from theories from the beginning of physics. This dynamical space generates a … …Physics International, Vol. 6, Issue 2 · 4 Aug 2015 · 8,518 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Quantum Mechanical Study of Structural and Electronic Dilution Effects in Paramagnetic Chemical Exchange Saturation Transfer AgentsWhelton A. Miller III, Preston B. MooreWe present a computational study of the effect of chemical modifications of the meta and para substituents in the coordinating pendant arm of a modified 1,4,7,10-tetraazacyclododecane-N, N’, N’’, N’’’-tetraamide (DOTAM) ligand on the Chemical Exchange Saturation Transfer (CEST) signal. Magnetic Resonance Imaging (MRI) is currently one of the most widely used techniques available. MRI has led to a new class … …Journal of Organic and Biomolecular Simulations, Vol. 1, Issue 1 · 11 Dec 2013 · 28,373 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleFractional Quantum Field Theory on Multifractals SetsEl-Nabulsi Ahmad RamiProblem statement: This study is a contribution to the general program of describing complex dynamical systems using the tool of fractional calculus of variations. Approach: Following our previous work, fractional quantum field theory based on the fractional actionlike variational approach supported by Saxena-Kumbhat fractional integrals functionals, fractional derivative of order (α, β) and dynamical fractional exponent on multi-fractal sets is … …American Journal of Engineering and Applied Sciences, Vol. 4, Issue 1 · 15 Mar 2011 · 7,347 accessesView PDFCite