Slides - grapes-3
... The idea: measure energy by total absorption also measure location the method is destructive: particle is stopped detector response proportional to particle energy As particles traverse material, they interact ...
... The idea: measure energy by total absorption also measure location the method is destructive: particle is stopped detector response proportional to particle energy As particles traverse material, they interact ...
Electron spin and probability current density in quantum mechanics
... whole spatial domain. However, there is also a local property: if the probability decreases in one region of space and increases in another, it must have flowed from one region to the other. This idea implies that there must exist a probability current density function describing this flow. This qua ...
... whole spatial domain. However, there is also a local property: if the probability decreases in one region of space and increases in another, it must have flowed from one region to the other. This idea implies that there must exist a probability current density function describing this flow. This qua ...
Irreversibility and the Arrow of Time in a Quenched
... strictly non-negative relative entropy? The answer to this puzzling question lies in the observation that the description of physical processes requires both equations of motion and initial conditions [1,13]. The choice of an initial thermal equilibrium state singles out a particular value of the en ...
... strictly non-negative relative entropy? The answer to this puzzling question lies in the observation that the description of physical processes requires both equations of motion and initial conditions [1,13]. The choice of an initial thermal equilibrium state singles out a particular value of the en ...
Anisotropic pyrochlores and the global phase diagram of the checkerboard... Oleg A. Starykh, Akira Furusaki, and Leon Balents
... antiferromagnetic or VBS ordering tendency, or fosters their balanced competition, respectively. While we believe this reasoning to be essentially correct, for many years, the richness of such possible behaviors went unrealized in the literature. This is because if the spin chains are linked by magn ...
... antiferromagnetic or VBS ordering tendency, or fosters their balanced competition, respectively. While we believe this reasoning to be essentially correct, for many years, the richness of such possible behaviors went unrealized in the literature. This is because if the spin chains are linked by magn ...
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.