Definition that contains quantum theory
- quantum a discrete amount of something that is analogous to the quantities in quantum theory
- quantum (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory)
- planck German physicist whose explanation of blackbody radiation in the context of quantized energy emissions initiated quantum theory (1858-1947)
- qed a relativistic quantum theory of the electromagnetic interactions of photons and electrons and muons
- quantise apply quantum theory to; restrict the number of possible values of (a quantity) or states of (a physical entity or system) so that certain variables can assume only certain discrete magnitudes that are integral multiples of a common factor
- quantum mechanics the branch of quantum physics that accounts for matter at the atomic level; an extension of statistical mechanics based on quantum theory (especially the Pauli exclusion principle)
- quantize apply quantum theory to; restrict the number of possible values of (a quantity) or states of (a physical entity or system) so that certain variables can assume only certain discrete magnitudes that are integral multiples of a common factor
- planck's law (physics) the basis of quantum theory; the energy of electromagnetic waves is contained in indivisible quanta that have to be radiated or absorbed as a whole; the magnitude is proportional to frequency where the constant of proportionality is given by Planck's constant
- quantization the act of dividing into quanta or expressing in terms of quantum theory
- quantum physics the branch of physics based on quantum theory