In quantum physics, a measurement is the testing or manipulation of a physical system to yield a numerical result. A fundamental feature of quantum theory...
67 KB (8,343 words) - 08:05, 12 July 2025
In quantum mechanics, the measurement problem is the problem of definite outcomes: quantum systems have superpositions but quantum measurements only give...
21 KB (2,447 words) - 10:51, 27 June 2025
interpretation of quantum mechanics is an attempt to explain how the mathematical theory of quantum mechanics might correspond to experienced reality. Quantum mechanics...
67 KB (7,637 words) - 00:33, 18 July 2025
moreover quantum mechanics provides a recipe for calculating this probability distribution. Indeterminacy in measurement was not an innovation of quantum mechanics...
18 KB (2,442 words) - 16:10, 13 April 2025
In quantum physics, a quantum state is a mathematical entity that embodies the knowledge of a quantum system. Quantum mechanics specifies the construction...
42 KB (5,551 words) - 00:17, 24 June 2025
The many-worlds interpretation (MWI) is an interpretation of quantum mechanics that asserts that the universal wavefunction is objectively real, and that...
70 KB (8,393 words) - 21:45, 19 July 2025
Wave function collapse (redirect from Measurement of the first kind)
function reduction to explain quantum measurement. In quantum mechanics each measurable physical quantity of a quantum system is called an observable...
24 KB (2,836 words) - 13:09, 28 July 2025
mathematical formulations of quantum mechanics are those mathematical formalisms that permit a rigorous description of quantum mechanics. This mathematical formalism...
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Quantum mechanics is the study of matter and matter's interactions with energy on the scale of atomic and subatomic particles. By contrast, classical...
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entanglement is a primary feature of quantum mechanics not present in classical mechanics.: 867 Measurements of physical properties such as position, momentum...
116 KB (13,742 words) - 03:21, 29 July 2025
A quantum limit in physics is a limit on measurement accuracy at quantum scales. Depending on the context, the limit may be absolute (such as the Heisenberg...
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operator that represents a measurement.: 55 The theoretical foundation of the concept of measurement in quantum mechanics is a contentious issue deeply...
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predicted prior to its measurement, given a complete set of initial conditions (the uncertainty principle). Quantum mechanics arose gradually from theories...
99 KB (12,154 words) - 00:33, 29 July 2025
Relational quantum mechanics (RQM) is an interpretation of quantum mechanics which treats the state of a quantum system as being relational, that is,...
47 KB (6,946 words) - 11:13, 27 June 2025
Born rule (redirect from Quantum probability)
is a postulate of quantum mechanics that gives the probability that a measurement of a quantum system will yield a given result. In one commonly used...
18 KB (2,258 words) - 03:43, 30 July 2025
self-Hamiltonian of the system. In a sense, QND measurements are the "most classical" and least disturbing type of measurement in quantum mechanics. Most devices capable...
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Einstein–Podolsky–Rosen paradox (redirect from Incompleteness of quantum mechanics)
description of physical reality provided by quantum mechanics is incomplete. In a 1935 paper titled "Can Quantum-Mechanical Description of Physical Reality...
39 KB (5,080 words) - 07:38, 29 July 2025
variables. The mathematical formulation of quantum mechanics assumes that the state of a system prior to measurement is indeterminate; quantitative bounds...
32 KB (4,032 words) - 01:27, 24 June 2025
Schrödinger's cat (redirect from Cat in a box theory)
In quantum mechanics, Schrödinger's cat is a thought experiment concerning quantum superposition. In the thought experiment, a hypothetical cat in a closed...
42 KB (4,834 words) - 16:44, 8 July 2025
how quantum systems convert to systems that can be explained by classical mechanics. Beginning out of attempts to extend the understanding of quantum mechanics...
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of experimental tests in classical mechanics forms a Boolean algebra, but the structure of experimental tests in quantum mechanics forms a much more complicated...
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of quantum mechanics is a fundamental part of the history of modern physics. The major chapters of this history begin with the emergence of quantum ideas...
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Observer effect (physics) (redirect from Quantum observation)
macroscopic measurements and records them by a time-irreversible process (Bell, John (2004). Speakable and Unspeakable in Quantum Mechanics: Collected...
7 KB (1,080 words) - 08:54, 17 May 2025
Copenhagen interpretation is a collection of views about the meaning of quantum mechanics, stemming from the work of Niels Bohr, Werner Heisenberg, Max Born...
81 KB (9,984 words) - 05:21, 31 July 2025
measurement. This also implies that there is not a clear or neat distinction between estimation and measurement. In quantum mechanics, a measurement is...
28 KB (3,704 words) - 20:43, 4 May 2025
Consciousness causes collapse (category Interpretations of quantum mechanics)
interpretation of quantum mechanics in which consciousness is postulated to be the main mechanism behind the process of measurement in quantum mechanics. It is a...
21 KB (2,442 words) - 17:11, 22 July 2025
Bell's theorem (redirect from Loopholes in optical Bell test experiments)
with quantum mechanics, and if it agrees with quantum mechanics it will not be local." In his original paper, Bell deduced that if measurements are performed...
78 KB (9,867 words) - 22:34, 16 July 2025
Quantum superposition is a fundamental principle of quantum mechanics that states that linear combinations of solutions to the Schrödinger equation are...
18 KB (2,471 words) - 20:55, 19 June 2025
POVM (redirect from Positive operator-valued measurement)
general kind of measurement in quantum mechanics, and can also be used in quantum field theory. They are extensively used in the field of quantum information...
19 KB (3,082 words) - 09:31, 23 June 2025
De Broglie–Bohm theory (redirect from Bohmian quantum mechanics)
quantum predictions as other interpretations of quantum mechanics. The theory does not have a "measurement problem", due to the fact that the particles have...
126 KB (16,769 words) - 16:06, 28 July 2025