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Vor 6 Tagen · A theory of gravity is a "metric theory" if and only if it can be given a mathematical representation in which two conditions hold: Condition 1 : There exists a symmetric metric tensor g μ ν {\displaystyle g_{\mu \nu }\,} of signature (−, +, +, +), which governs proper-length and proper-time measurements in the usual manner of special and general relativity:
Vor 4 Tagen · 1910s. Einstein's 1911 argument for gravitational redshift. 1911 – Albert Einstein explains the need to replace both special relativity and Newton's theory of gravity; he realizes that the principle of equivalence only holds locally, not globally. [42] 1915-16 – Albert Einstein completes his general theory of relativity.
29. Apr. 2024 · Niels Bohr colloquim (Andrew Jordan): Quantum Measurement, The Book I will present an overview of some of the most striking advances in the theory and experiments of quantum measurement. Topics covered will include weak measurement, continuous measurement, amplification, and how to break the cardinal rules of textbook quantum measurements.
Vor einem Tag · Niels Bohr. Niels Henrik David Bohr ( Danish: [ˈne̝ls ˈpoɐ̯ˀ]; 7 October 1885 – 18 November 1962) was a Danish physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922. Bohr was also a philosopher and a promoter of scientific research.
Vor 5 Tagen · In quantum mechanics, perturbation theory is a set of approximation schemes directly related to mathematical perturbation for describing a complicated quantum system in terms of a simpler one. The idea is to start with a simple system for which a mathematical solution is known, and add an additional "perturbing" Hamiltonian representing a weak disturbance to the system.
Vor 3 Tagen · Canonical commutation rule for position q and momentum p variables of a particle, 1927. pq − qp = h / (2 πi ). Uncertainty principle of Heisenberg, 1927. The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is a limit to the precision with which ...
8. Mai 2024 · Pascual Jordan - Ernst Pascual Jordan (German: [ˈjɔɐ̯daːn]; 18 October 1902 – 31 July 1980) was a German theoretical and mathematical physicist who made significant contributions to quantum mechanics and quan