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gaussian wavepackets
gaussian wavepackets

Durham Research Online
Durham Research Online

The Large Hadron Collider (LHC)
The Large Hadron Collider (LHC)

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Accurate Modeling of Organic Molecular Crystals by Dispersion

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Physics 30 - Structured Independent Learning

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Multiphoton population transfer in systems violating the classical twist condition: A... study of separatrix crossing in phase space

Fractals as macroscopic manifestation of squeezed
Fractals as macroscopic manifestation of squeezed



... FIG. 4: Experimental NMR spectra and respective tomographed density matrices, for the four bell states, as indicated on the figure. FIG. 3: Experimental NMR spectra and respective tomographed density matrices, for (a) before and after the operation HB |00i = √1 [|00i + |01i] (Hadamard gate applied t ...
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Quantum correlations
Quantum correlations

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... antiferromagnets. Note that the two-spinon approximation is not a low-energy one (unlike the familiar and powerful ‘bosonization’ technique) as it includes spinons with energies reaching up to πJ /2  J 0 . This is essential for comparison with inelastic neutron scattering data which extends over th ...
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Trajectory-Based Coulomb-Corrected Strong Field

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Density Matrix Calculation of Surface Enhanced

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A Theoretical Study of Atomic Trimers in the Critical Stability Region
A Theoretical Study of Atomic Trimers in the Critical Stability Region

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... a) The SI unit of the electric field is the newton per meter (N/m) b) The electric field is a vector quantity. c) At a given point, a charged particle will experience a force, if an electric field is present at that location. d) If a positively-charged particle is placed at a location where the elec ...
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quantum transition-state theory. II. Recovery of the exact quantum

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Copenhagen interpretation From Wikipedia, the free encyclopedia

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On-Shell Methods in Perturbative QCD

Suppression of error in qubit rotations due to Bloch–Siegert oscillation... resonant Raman excitation
Suppression of error in qubit rotations due to Bloch–Siegert oscillation... resonant Raman excitation

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Renormalization



In quantum field theory, the statistical mechanics of fields, and the theory of self-similar geometric structures, renormalization is any of a collection of techniques used to treat infinities arising in calculated quantities.Renormalization specifies relationships between parameters in the theory when the parameters describing large distance scales differ from the parameters describing small distances. Physically, the pileup of contributions from an infinity of scales involved in a problem may then result in infinities. When describing space and time as a continuum, certain statistical and quantum mechanical constructions are ill defined. To define them, this continuum limit, the removal of the ""construction scaffolding"" of lattices at various scales, has to be taken carefully, as detailed below.Renormalization was first developed in quantum electrodynamics (QED) to make sense of infinite integrals in perturbation theory. Initially viewed as a suspect provisional procedure even by some of its originators, renormalization eventually was embraced as an important and self-consistent actual mechanism of scale physics in several fields of physics and mathematics. Today, the point of view has shifted: on the basis of the breakthrough renormalization group insights of Kenneth Wilson, the focus is on variation of physical quantities across contiguous scales, while distant scales are related to each other through ""effective"" descriptions. All scales are linked in a broadly systematic way, and the actual physics pertinent to each is extracted with the suitable specific computational techniques appropriate for each.
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