Particle number operator — In quantum mechanics, for systems where the total number of particles may not be preserved, the number operator is the observable that counts the number of particles. The number operator acts on Fock space. Given a Fock state composed of single… … Wikipedia
Particle number — Conjugate variables of thermodynamics Pressure Volume (Stress) (Strain) Temperature Entropy Chemical potential Particle number The particle number (or number of particles) of a thermodynamic system … Wikipedia
particle number density operator — dalelių tankio operatorius statusas T sritis fizika atitikmenys: angl. particle number density operator vok. Teilchenanzahldichteoperator, m rus. оператор плотности числа частиц, m pranc. opérateur du nombre volumique de particules, m … Fizikos terminų žodynas
Virtual particle — In physics, a virtual particle is a particle that exists for a limited time and space, introducing uncertainty in their energy and momentum due to the Heisenberg Uncertainty Principle. (Indeed, because energy and momentum in quantum mechanics are … Wikipedia
Particle swarm optimization — (PSO) is a swarm intelligence based algorithm to find a solution to an optimization problem in a search space, or model and predict social behavior in the presence of objectives.OverviewParticle swarm optimization is a stochastic, population… … Wikipedia
Particle in a spherically symmetric potential — In quantum mechanics, the particle in a spherically symmetric potential describes the dynamics of a particle in a potential which has spherical symmetry. The Hamiltonian for such a system has the form:hat{H} = frac{hat{p}^2}{2m 0} + V(r)where m 0 … Wikipedia
Operator product expansion — Contents 1 2D Euclidean quantum field theory 2 General 3 See also 4 External links 2D Euclidean quantum field theory … Wikipedia
Anti-symmetric operator — In quantum mechanics, a raising or lowering operator (collectively known as ladder operators) is an operator that increases or decreases the eigenvalue of another operator. In quantum mechanics, the raising operator is sometimes called the… … Wikipedia
Wave–particle duality — Quantum mechanics Uncertainty principle … Wikipedia
Magnetic-particle inspection — (MPI) is a non destructive testing (NDT) process for detecting surface and subsurface discontinuities in ferroelectric materials such as iron, nickel, cobalt, and some of their alloys. The process puts a magnetic field into the part. The piece… … Wikipedia