In physics, a free particle is a particle that, in some sense, is not bound by an external force, or equivalently not in a region where its potential energy varies. In classical physics, this means the particle is present in a "field-free" space. In quantum mechanics, it means the particle is in a region of uniform potential, usually set to zero in the region of interest since the potential can be arbitrarily set to zero at any point in space.
In physics, a freeparticle is a particle that, in some sense, is not bound by an external force, or equivalently not in a region where its potential...
system with a position degree of freedom is a freeparticle in a single spatial dimension. A freeparticle is one which is not subject to external influences...
the particle in a box model (also known as the infinite potential well or the infinite square well) describes the movement of a freeparticle in a small...
moving particle is different from non-relativistic mechanics. It is instructive to look at the total relativistic energy of a free test particle. An observer...
Free electron in physics may refer to: Electron, as a freeparticle Solvated electron Charge carrier, as carriers of electric charge Valence electron...
In particle physics, a massless particle is an elementary particle whose invariant mass is zero. At present the only confirmed massless particle is the...
of this is that the amplitude for a freeparticle to travel between two points includes amplitudes for the particle to fluctuate into an antiparticle,...
mechanics, the case of a particle in a one-dimensional ring is similar to the particle in a box. The Schrödinger equation for a freeparticle which is restricted...
of free space that does not contain a charge. It is described by Laplace's equation: ∇ 2 u = 0 {\displaystyle \nabla ^{2}u=0} One can model particle diffusion...
In particle physics, the W and Z bosons are vector bosons that are together known as the weak bosons or more generally as the intermediate vector bosons...
physics, a subatomic particle is a particle smaller than an atom. According to the Standard Model of particle physics, a subatomic particle can be either a...
Higgs boson, sometimes called the Higgs particle, is an elementary particle in the Standard Model of particle physics produced by the quantum excitation...
function that depends upon position is the probability density of measuring a particle as being at a given place. The integral of a wavefunction's squared modulus...
A particle accelerator is a machine that uses electromagnetic fields to propel charged particles to very high speeds and energies, and to contain them...
a charge carrier is a particle or quasiparticle that is free to move, carrying an electric charge, especially the particles that carry electric charges...
Lagrangian for two interacting particles is L = L f + L int , {\displaystyle L=L_{\text{f}}+L_{\text{int}},} where the freeparticle part is L f = 1 2 m 1 v...
completely specifies a unique eigenstate of the Hydrogenic atom. For a freeparticle, the Hamiltonian H = − ℏ 2 2 m ∇ 2 {\displaystyle H=-{\frac {\hbar ^{2}}{2m}}\nabla...
In physics, mean free path is the average distance over which a moving particle (such as an atom, a molecule, or a photon) travels before substantially...
propagator is a function that specifies the probability amplitude for a particle to travel from one place to another in a given period of time, or to travel...
bradyon, tardyon, or ittyon in Wiktionary, the free dictionary. Elementary particle Massless particleParticle Tachyon Ron Folman; Erasmo Recami (1995). "On...
The neutron is a subatomic particle, symbol n or n0 , which has a neutral (not positive or negative) charge, and a mass slightly greater than that of a...
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