Presentism and Quantum Gravity
... Fixed foliation quantum gravity is compatible with presentism. To show this, it will be helpful to utilize the semantic view of scientific theories (see for example van Fraassen 1987). A scientific theory is taken to have two parts, the theoretical structure and the theoretical hypotheses. The theor ...
... Fixed foliation quantum gravity is compatible with presentism. To show this, it will be helpful to utilize the semantic view of scientific theories (see for example van Fraassen 1987). A scientific theory is taken to have two parts, the theoretical structure and the theoretical hypotheses. The theor ...
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... it has long been expected that if any solution existed it would be counterintuitive [11]. This Cordus solution exploits just such an exception. Importantly, it shows that the appropriate quantitative predictions for entanglement are achievable not only by quantum mechanics but also with this design ...
... it has long been expected that if any solution existed it would be counterintuitive [11]. This Cordus solution exploits just such an exception. Importantly, it shows that the appropriate quantitative predictions for entanglement are achievable not only by quantum mechanics but also with this design ...
this essay - u.arizona.edu
... magnetic field. But if many silver atoms are similarly prepared by some source, the relative frequencies with which they are detected at various locations do provide information about the source, and thereby permit reliable statistical inferences about the measured behavior of such silver atoms in o ...
... magnetic field. But if many silver atoms are similarly prepared by some source, the relative frequencies with which they are detected at various locations do provide information about the source, and thereby permit reliable statistical inferences about the measured behavior of such silver atoms in o ...
Renormalization
In quantum field theory, the statistical mechanics of fields, and the theory of self-similar geometric structures, renormalization is any of a collection of techniques used to treat infinities arising in calculated quantities.Renormalization specifies relationships between parameters in the theory when the parameters describing large distance scales differ from the parameters describing small distances. Physically, the pileup of contributions from an infinity of scales involved in a problem may then result in infinities. When describing space and time as a continuum, certain statistical and quantum mechanical constructions are ill defined. To define them, this continuum limit, the removal of the ""construction scaffolding"" of lattices at various scales, has to be taken carefully, as detailed below.Renormalization was first developed in quantum electrodynamics (QED) to make sense of infinite integrals in perturbation theory. Initially viewed as a suspect provisional procedure even by some of its originators, renormalization eventually was embraced as an important and self-consistent actual mechanism of scale physics in several fields of physics and mathematics. Today, the point of view has shifted: on the basis of the breakthrough renormalization group insights of Kenneth Wilson, the focus is on variation of physical quantities across contiguous scales, while distant scales are related to each other through ""effective"" descriptions. All scales are linked in a broadly systematic way, and the actual physics pertinent to each is extracted with the suitable specific computational techniques appropriate for each.