Quantum-chromodynamics
noun, Physics.
1.
a quantum field theory that describes quarks and gluons and their interactions, with the color of the quarks playing a role analogous to that of electric charge.
Abbreviation: QCD.
Also called chromodynamics.
Compare (def 18).
noun
1.
(physics) a theory describing the strong interaction in terms of quarks and gluons, with the colour of quarks used as an analogue of charge and the gluon as an analogue of the photon QCD
quantum chromodynamics
A quantum field theory of the strong force that explains the interaction between particles with color charge, such as quarks and gluons. In quantum chromodynamics, particles interact through the strong force by exchanging gluons, which are the carriers of the strong force (much as photons are the carriers of the electromagnetic force in quantum electrodynamics). The theory is particularly important in theories of the atomic nucleus, whose nucleons are composed of quarks.
Read Also:
- Quantum-computer
noun 1. a computer that makes use of the quantum states of electrons or other particles to store and process information as quantum bits. noun 1. a type of computer which uses the ability of quantum systems to be in many different states at once, thus allowing it to perform many different computations simultaneously quantum […]
- Quantum cryptography
noun 1. a method of coding information based on quantum mechanics, which is said to be unbreakable
- Quantum dot
physics (Or “single-electron transistor”) A location capable of containing a single electrical charge; i.e., a single electron of Coulomb charge. Physically, quantum dots are nanometer-size semiconductor structures in which the presence or absence of a quantum electron can be used to store information. See also: quantum cell, quantum cell wire, quantum-dot cellular automata. (http://www-mtl.mit.edu/MTL/bulletin/v6n2/Kumar.html). [“Quantum […]
- Quantum-dot cellular automata
electronics, computing (QCA) Quantum logic circuits created by orientating pairs of quantum cells so that their relative positions determine their affect on each other. This is functionally analogous but structurally different from how individual gates in integrated circuits are combined to create logical and memory circuitry. The advantages of quantum-dot cellular automata over conventional circuitry […]
- Quantum efficiency
noun 1. (physics) the number of electrons released by a photocell per photon of incident radiation of a given energy 2. (chem) the number of chemical species that undergo reaction per photon of absorbed radiation of a given energy