Results 231 to 240 of about 3,086 (259)

Photodetection and causality in quantum optics

Physical Review A, 1995
The theory of photodetection and quantum-optical coherence is formulated in the Heisenberg picture and in such a way that the causal propagation of fields at the velocity of light is manifest. Objections to the standard theory, based on a putative violation of causality, are shown to be unfounded, as is the notion that normal ordering is essential for ...
, Milonni, , James, , Fearn
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Quantum causality

Nature Physics, 2014
Traditionally, quantum theory assumes the existence of a fixed background causal structure. But if the laws of quantum mechanics are applied to the causal relations, then one could imagine situations in which the causal order of events is not always fixed, but is subject to quantum uncertainty.
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Causal nonlinear quantum optics

Journal of Physics B: Atomic, Molecular and Optical Physics, 2006
We present a quantization scheme for the electromagnetic field in locally responding nonlinear dielectric materials with dispersion and absorption. Based on the Green tensor expansion of the macroscopic electromagnetic field, we derive an expression for the nonlinear polarization that contains, besides the reactive part which is responsible for the ...
Stefan Scheel, Dirk-Gunnar Welsch
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Probability and Causality in Quantum Physics

Monist, 1932
In attempting to formulate the logical structure of quantum physics it is necessary to refer frequently to probabilities; even the basic axioms of this system of thought which progressively pervades the various branches of physical science involve an explicit appeal to probability concepts.
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Probabilistic causality in quantum mechanics

Journal of Statistical Planning and Inference, 1990
I want to begin by expressing my pleasure at being able to contribute to a symposium in honor of Jack Good. We have known each other more years now than I care to remember. Over this long period I have learned much from his papers and from conversations about many different but related subjects.
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The Causal Interpretation of Quantum Mechanics

Physical Review, 1953
In connection with the discussion given in a previous note, a classical Hamilton-Jacobi equation associated with the Schr\"odinger function in momentum space is derived. Certain "extra" terms in this equation are shown to be of quantum-mechanical origin.
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