Quantum field-theoretic differences of magnetic properties than expected from classical theories
In quantum electrodynamics, the anomalous magnetic moment of a particle is a contribution of effects of quantum mechanics, expressed by Feynman diagrams with loops, to the magnetic moment of that particle. The magnetic moment, also called magnetic dipole moment, is a measure of the strength of a magnetic source.
The "Dirac" magnetic moment, corresponding to tree-level Feynman diagrams (which can be thought of as the classical result), can be calculated from the Dirac equation. It is usually expressed in terms of the g-factor; the Dirac equation predicts . For particles such as the electron, this classical result differs from the observed value by a small fraction of a percent. The difference is the anomalous magnetic moment, denoted and defined as
and 25 Related for: Anomalous magnetic dipole moment information
the magnetic moment of that particle. The magneticmoment, also called magneticdipolemoment, is a measure of the strength of a magnetic source. The "Dirac"...
atomic physics, the electron magneticmoment, or more specifically the electron magneticdipolemoment, is the magneticmoment of an electron resulting from...
The electric dipolemoment is a measure of the separation of positive and negative electrical charges within a system, that is, a measure of the system's...
Fermilab. The anomalousmagneticdipolemoment is the difference between the experimentally observed value of the magneticdipolemoment and the theoretical...
a billion (10−8), based on the comparison of the electron anomalousmagneticdipolemoment and the Rydberg constant from atom recoil measurements as described...
calculations of the anomalousmagneticdipolemoment. The electron g-factor is known to twelve decimal places by measuring the electron magneticmoment in a one-electron...
The nucleon magnetic moments are the intrinsic magneticdipole moments of the proton and neutron, symbols μp and μn. The nucleus of an atom comprises protons...
examining the neutron's magneticdipolemoment and hypothetical electric dipolemoment. Under time reversal, the magneticdipolemoment changes its direction...
corrections to this value. These corrections, referred to as the anomalousmagneticdipolemoment, are very sensitive to the details of a quantum field theory...
atom, Isidor Rabi made measurements of the Lamb shift and the anomalousmagneticdipolemoment of the electron. These effects corresponded to the deviation...
Brookhaven National Laboratory to measure the anomalousmagneticdipolemoment of the muon. The magneticdipolemoment (g) of a charged lepton (electron, muon...
of which is the electron magneticdipolemoment, which is related to its quantum-mechanical spin. Mathematically, the magnetic field of an object is often...
corrections from quantum field theory such as the Lamb shift and the anomalousmagneticdipolemoment of the electron are not included. Angular momentum coupling...
four-potential, a {\displaystyle a} is proportional to the anomalousmagneticdipolemoment, F μ ν = ∂ μ A ν − ∂ ν A μ {\displaystyle F^{\mu \nu }=\partial...
(in the dipole approximation), as governed by the selection rules. Since the distance between the Zeeman sub-levels is a function of magnetic field strength...
is the magneticdipolemoment, J→{\displaystyle {\vec {J}}} is the angular momentum vector, B→{\displaystyle {\vec {B}}} is the external magnetic field...
of the magnetic orientation of minerals in rocks. In order to maintain the magnetic field against ohmic decay (which would occur for the dipole field in...
to corresponding magneticmoment of a particle, having a value of approximately 2. Anomalousmagneticmoment Electron magneticmoment Bohr radius Nuclear...
subclade of Haplogroup G (Y-DNA) g−2, the notation for the anomalousmagneticdipolemoment in physics Muon g-2 experiment at Fermilab (E989) g(2), degree...