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What Is An Elementary Particle?
What Is An Elementary Particle?

... of the charge independence of nuclear forces by Merle Tuve et al. that showed clearly that neutrons and protons have to be treated in the same way; if protons are elementary, then neutrons must be elementary too. Today, in speaking of protons and neutrons, we often lump them together as nucleons. Th ...
Tunneling and the Vacuum Zero
Tunneling and the Vacuum Zero

Melting of a 2D quantum electron solid in high magnetic field LETTERS
Melting of a 2D quantum electron solid in high magnetic field LETTERS

Chapter 10 Physics of Electrons
Chapter 10 Physics of Electrons

Module 4: Light Emitting Diodes
Module 4: Light Emitting Diodes

What is and to which end does one study Bohmian Mechanics?
What is and to which end does one study Bohmian Mechanics?

... momentum of the photons reaching any particular position in the image plane, and, by repeating this procedure in a series of planes, we can reconstruct trajectories over that range. In this sense, weak measurement finally allows us to speak about what happens to an ensemble of particles inside an in ...
What lies beyond? - University of Toronto Physics
What lies beyond? - University of Toronto Physics

Chapter 2: Interacting Rydberg atoms
Chapter 2: Interacting Rydberg atoms

... electric fields, with their polarizability scaling with the principal quantum number like n∗ 7 . This is also the case when the electric field is generated by the charge distribution of the Rydberg electron of another atom, therefore we can expect Rydberg atoms to exhibit very strong interactions. T ...
interference as measurement -- quantum states of light, single
interference as measurement -- quantum states of light, single

presentation source
presentation source

... independent of our immediate experience? – Are all measurements really position measurements, even though precise positions are never measured! – What happens after measurements? – Are actual and virtual events the same or different? – Are all events really interactions? ...
Physics Today
Physics Today

Review of Bernard d`Espagnat, On physics and philosophy
Review of Bernard d`Espagnat, On physics and philosophy

... apart in opposite spatial directions. When the two photons are separated by a space-like interval so that there no longer is any interaction between them, spin-parameters are fixed that are to be measured on each of the two photons, and two such measurements are carried out. The measurement outcomes ...
AJR Ch7 Quantum Theory and Electronic Structure of Atoms.docx
AJR Ch7 Quantum Theory and Electronic Structure of Atoms.docx

Quasiparticles and Effective Mass
Quasiparticles and Effective Mass

... If the electrons are in a partially filled band, this will break the symmetry of electron states in the 1st BZ and produce a net current. But if they are in a filled band, even though all electrons change k vectors, the symmetry remains, so J = 0. ...
Information measures of hydrogenic systems, Laguerre polynomials
Information measures of hydrogenic systems, Laguerre polynomials

A high-speed tunable beam splitter for feed
A high-speed tunable beam splitter for feed

Rutherford atom in quantum theory
Rutherford atom in quantum theory

The Real Reason Why the Electron`s Bare g
The Real Reason Why the Electron`s Bare g

2 Properties of 3jm- and 3nj-Symbols
2 Properties of 3jm- and 3nj-Symbols

Road to the Quantum Computer Now Found!
Road to the Quantum Computer Now Found!

... watched too much. This poster is not wrong as a pictorial explanation of the logic, but it is not at all a representation of the “quantum computer” itself. A large number of books and websites offer explanations of the “quantum computer,” but the hurdle to be cleared is quite high in order for us to ...
this document - ITP Lecture Archive
this document - ITP Lecture Archive

if on the Internet, Press  on your browser to
if on the Internet, Press on your browser to

electron spin - Project PHYSNET
electron spin - Project PHYSNET

... The goal of our project is to assist a network of educators and scientists in transferring physics from one person to another. We support manuscript processing and distribution, along with communication and information systems. We also work with employers to identify basic scientific skills as well ...
Generation of twin-photons in triple microcavities
Generation of twin-photons in triple microcavities

... applications. A vertical triple microcavity consists in three coupled planar microcavities, optically strongly coupled via 2 intermediate Bragg mirrors so that the electro-magnetic field is delocalized throughout the full nanostructure. At resonance between the three cavities, the cavity mode degene ...
IonosphericAbsorption
IonosphericAbsorption

... earth’s ionosphere, at two separate altitudes. At 86 km, two modes are propagating. Note the anisotropy. At 161 km, only one mode (the whistler mode) is propagating. Note the strong anisotropy. Propagation is not possible at angles perpendicular to the magnetic field, where the refractive index goes ...
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Quantum electrodynamics



In particle physics, quantum electrodynamics (QED) is the relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter interact and is the first theory where full agreement between quantum mechanics and special relativity is achieved. QED mathematically describes all phenomena involving electrically charged particles interacting by means of exchange of photons and represents the quantum counterpart of classical electromagnetism giving a complete account of matter and light interaction.In technical terms, QED can be described as a perturbation theory of the electromagnetic quantum vacuum. Richard Feynman called it ""the jewel of physics"" for its extremely accurate predictions of quantities like the anomalous magnetic moment of the electron and the Lamb shift of the energy levels of hydrogen.
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