| 单词 | uncertainty principle |
| 释义 | > as lemmas(Heisenberg's) uncertainty principle 5. (Heisenberg's) uncertainty principle (Physics), a principle of quantum mechanics implying that certain pairs of observables (e.g. the momentum and position of a particle, the energy and lifetime of a quantum level) cannot both be precisely and simultaneously known, and that as one of any pair is more exactly defined, the other becomes more uncertain. Also transferred. Cf. Heisenberg n., principle of indeterminacy n. at indeterminacy n. Compounds.The principle is usually stated as an inequality such that the product of the uncertainties of the pair of observables cannot be less than a quantity of the order of Planck's constant. ΘΚΠ the world > matter > physics > quantum theory > quantum mechanics > matrix mechanics > [noun] > uncertainty principle principle of indeterminacy1928 (Heisenberg's) uncertainty principle1929 1928 Physical Rev. 32 570 The principle of uncertainty is particularly clear in this [sc. Weyl's] system.] 1929 E. U. Condon & P. M. Morse Quantum Mech. i. 21 (heading) The quantum uncertainty principle. 1931 Times Lit. Suppl. 5 Nov. 852/4 Perhaps the most remarkable discovery that has been made in connexion with atomic theory is the so-called Uncertainty Principle. 1955 W. Heisenberg in W. Pauli Niels Bohr & Devel. Physics 15 It was now [sc. in 1927] assumed in quantum mechanics that real states can always be represented as vectors in Hilbert space (or as ‘mixtures’ of such vectors). The uncertainty principle was the simple expression for this assumption. 1977 Time 14 Mar. 74/1 Even in the age of the Uncertainty Principle and culture fracture, Warren has not lost his sense of life as a sustained drama. 1982 A. M. Lesk Introd. Physical Chem. x. 309 What Heisenberg's uncertainty principle asserts is that for no state of any system can all dynamical variables be arbitrarily well-determined. < as lemmas |
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