Search results for "Optical correlation"

showing 3 items of 3 documents

Nonlocal properties of entangled two-photon generalized binomial states in two separate cavities

2007

We consider entangled two-photon generalized binomial states of the electromagnetic field in two separate cavities. The nonlocal properties of this entangled field state are analyzed by studying the electric field correlations between the two cavities. A Bell's inequality violation is obtained using an appropriate dichotomic cavity operator, that is in principle measurable.

Electromagnetic fieldPhysicsQuantum PhysicsSettore FIS/02 - Fisica Teorica Modelli E Metodi MatematiciBinomial (polynomial)Field (physics)Operator (physics)Electric fields Electromagnetic fields Optical correlation Optical propertiesPhysics::OpticsFOS: Physical sciencesState (functional analysis)Quantum PhysicsAtomic and Molecular Physics and OpticsSettore FIS/03 - Fisica Della MateriaElectronic Optical and Magnetic MaterialsQuantum mechanicsElectric fieldPhysics::Accelerator PhysicsQuantum Physics (quant-ph)
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Band Gap Modeling of Different Ternary and Quaternary Alumina Garnet Phases Y3(AlXGa1-X)5O12 (YAGG) and Lu3(AlXGa1-X)5O12 (LuAGG). A Semiempirical Ap…

2022

A further generalization to quaternary oxide systems of the modeling equation of optical band gap values, based on the semiempirical correlation between the differences in the electronegativity of oxygen and the average cationic electronegativity, proposed some years ago, has been carried out by expanding the approach recently employed for ternary mixed oxides. The choice of oxide polymorphs and their influence on the fitting procedure of an experimental data set is evidenced by a detailed discussion of the fitting process of the literature's experimental band gap data pertaining two quaternary oxide systems of the garnet family, namely, Y3(AlxGa1-x)5O12 (YAGG) and Lu3(AlxGa1-x)5O12 (LuAGG)…

Modeling equationGarnetSemi-empirical approachAluminaExcitonic effectAluminum oxideValue-based Energy gapElectronegativitySettore ING-IND/23 - Chimica Fisica ApplicataOptical correlation Band-gap valueDensity functional theoryQuaternary oxideSemi-empirical correlationChemical bondOxide systemGeneralisationGap model
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Correlated optical and X-ray variability in CTTS

2010

Optical and X-ray emission from classical T Tauri stars (CTTSs) has long been known to be highly variable. Our long, uninterrupted optical observation of the NGC2264 region with CoRoT allows the optical variability in CTTS to be studied with unprecedented accuracy and time coverage. Two short Chandra observations obtained during the CoRoT pointing with a separation of 16 days allow us to study whether there is a correlation between optical and X-ray variability on this timescale, thus probing the physical mechanisms driving the variability in both bands. We have computed the optical and X-ray fractional variability between the two 30 ks duration windows covered by both the Chandra and CoRoT…

PhysicsStar formationAstrophysics::High Energy Astrophysical PhenomenaX-rayFOS: Physical sciencesSoft X-radiationAstronomy and AstrophysicsAstrophysicsT Tauri starAstrophysics - Solar and Stellar AstrophysicsSpace and Planetary ScienceHomogeneousWeak lineAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary AstrophysicsOptical correlationSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy AstrophysicsOptical observationAstronomy and Astrophysics
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