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Bohmian Trajectories of the Two-Electron Helium Atom
Bohmian Trajectories of the Two-Electron Helium Atom

... the wavefunction as giving a measure of the relative probability of finding the system at a particular point in configuration space. The constancy of the norm of the wavefunction then expressed the fact that there is always a probability equal to unity of finding the system at some point in configu ...
THE LIGHT VELOCITY CASIMIR EFFECT
THE LIGHT VELOCITY CASIMIR EFFECT

Document
Document

... We start with the simplest form – two parallel conducting plates separated by vacuum Let the conducting plates have area A and be separated by a distance d The magnitude of the electric field between the two plates is given by We treat the field as being uniform allowing us to write ...
here.
here.

Accelerator_course_english3 - Indico
Accelerator_course_english3 - Indico

... Electronvolt, unit for energy denoted by eV, is used for small energies (joule) 1 eV is defined as the energy needed to move one electron, with charge e e (around 1.602·10-19 C) in an electrical field with the strength 1 V/m a distance of 1 meter: ...
Accuracy of microwave cavity perturbation measurements
Accuracy of microwave cavity perturbation measurements

From waves to bullets: testing Feynman`s idea on the two slit
From waves to bullets: testing Feynman`s idea on the two slit

... Does this last sentence sound meaningful? As a matter of fact, it is hard to swallow that, according to Feynman, even billiard balls would produce an interference pattern, although so dense that it cannot be seen. Rather, it is easier to think that in such a case interference fringes would not be pr ...
How far are we from the quantum theory of gravity?
How far are we from the quantum theory of gravity?

Quantum Biology at the Cellular Level
Quantum Biology at the Cellular Level

Notes for course on Physics of Particles and Fields, CMI, Autumn
Notes for course on Physics of Particles and Fields, CMI, Autumn

... • In Newtonian and celestial mechanics we often treat billiard balls, the sun and planets as point particles. In much of biology and some of chemistry, atoms may be treated as elementary particles, as the energies exchanged are too small to excite atoms. In atomic physics, photons, electrons and nuc ...
Model for a Josephson junction array coupled to a resonant... J. Kent Harbaugh and D. Stroud
Model for a Josephson junction array coupled to a resonant... J. Kent Harbaugh and D. Stroud

B.Sc. (H) PHYSICS THREE-YEAR FULL-TIME PROGRAMME (Six-Semester Course)
B.Sc. (H) PHYSICS THREE-YEAR FULL-TIME PROGRAMME (Six-Semester Course)

... 1. To use a Multimeter for measuring (a) Resistances, (b) A/C and DC Voltages, (c) AC and DC Currents, (d) Capacitances, and (e) Frequencies. 2. To test a Diode and Transistor using (a) a Multimeter and (b) a CRO. 3. To measure (a) Voltage, (b) Frequency and (c) Phase Difference using a CRO. 4. To s ...
States and Operators in the Spacetime Algebra
States and Operators in the Spacetime Algebra

The Double Slit Experiment and Quantum Mechanics∗
The Double Slit Experiment and Quantum Mechanics∗

publ_4 - OPEN-ADAS
publ_4 - OPEN-ADAS

downloaded
downloaded

Boundary condition for the distribution function of conduction
Boundary condition for the distribution function of conduction

Huge density-dependent blueshift of indirect excitons in biased
Huge density-dependent blueshift of indirect excitons in biased

Quantum path-integral study of the phase diagram and isotope
Quantum path-integral study of the phase diagram and isotope

... (BO) approximation, independent of the nuclear mass. Thus the BO potential energy surface (PES), that represents the energy landscape for the motion of the nuclei, results to be independent of the isotope mass. Many processes and properties depend on the movement of the atoms on the PES. Then, isoto ...
Space-time counterfactuals
Space-time counterfactuals

Coulomb fission in multiply charged molecular clusters: Experiment
Coulomb fission in multiply charged molecular clusters: Experiment

Lecture 23. Statistics of Ideal Quantum Systems
Lecture 23. Statistics of Ideal Quantum Systems

Basic Concepts of Integration
Basic Concepts of Integration

The Asymptotic Safety Scenario in Quantum Gravity
The Asymptotic Safety Scenario in Quantum Gravity

a timeline of particle accelerators
a timeline of particle accelerators

< 1 ... 68 69 70 71 72 73 74 75 76 ... 511 >

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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