Peter Heuer - Quantum Cryptography Using Single and Entangled
... over a classical communication channel. When their basis agreed they take those measured values as zeros and ones, which becomes the key for their code. By comparing the remaining photons, Bob can check that Eve has not intercepted the communication. If she has, the remaining photons will be in a di ...
... over a classical communication channel. When their basis agreed they take those measured values as zeros and ones, which becomes the key for their code. By comparing the remaining photons, Bob can check that Eve has not intercepted the communication. If she has, the remaining photons will be in a di ...
Two electrons in a cylindrical quantum dot under constant magnetic
... The energy spectrum obtained for various quantum numbers are plotted as a function of external magnetic field strength in Fig. 1. We have chosen r 0 ¼ 15 nm, to avoid the piling up of many energy levels in a window of energy between 0 and 100 meV, but at the same time granting us decent number of cur ...
... The energy spectrum obtained for various quantum numbers are plotted as a function of external magnetic field strength in Fig. 1. We have chosen r 0 ¼ 15 nm, to avoid the piling up of many energy levels in a window of energy between 0 and 100 meV, but at the same time granting us decent number of cur ...
PDF only - at www.arxiv.org.
... galactic scale are unpredictable in principle. Thus spacetime evolution is not predictable even in principle in physically realisable cases. The outcome is only determined as it happens. The Evolving Block Universe model of spacetime represents this kind of situation, showing how time progresses, ev ...
... galactic scale are unpredictable in principle. Thus spacetime evolution is not predictable even in principle in physically realisable cases. The outcome is only determined as it happens. The Evolving Block Universe model of spacetime represents this kind of situation, showing how time progresses, ev ...
Physics 121 Practice Problem Solutions 11 Faraday`s Law of Induction
... parallel to the rails. Assume that v = 5.00 m/s, a = 10.0 mm, L = 10.0 cm, and i = 100 A. (a) Calculate the emf induced in the rod. (b) What is the current in the conducting loop? Assume that the resistance of the rod is 0.400 Ω and that the resistance of the rails and the strip that connects them a ...
... parallel to the rails. Assume that v = 5.00 m/s, a = 10.0 mm, L = 10.0 cm, and i = 100 A. (a) Calculate the emf induced in the rod. (b) What is the current in the conducting loop? Assume that the resistance of the rod is 0.400 Ω and that the resistance of the rails and the strip that connects them a ...
Are Quantum Objects Propensitons
... The inability of OQT to answer these two elementary questions is in itself a serious failure of the theory. But there are, as a consequence, a host of further failures and defects. Because OQT is about the results of performing measurements on quantum systems (and not about quantum systems per se, d ...
... The inability of OQT to answer these two elementary questions is in itself a serious failure of the theory. But there are, as a consequence, a host of further failures and defects. Because OQT is about the results of performing measurements on quantum systems (and not about quantum systems per se, d ...
Taylor`s experiment (1909)
... if such a correlation existed, a major revision of fundamental concepts in quantum mechanics would be required (Ádám, Jánossy & Varga, 1955; Brannen & Ferguson, ...
... if such a correlation existed, a major revision of fundamental concepts in quantum mechanics would be required (Ádám, Jánossy & Varga, 1955; Brannen & Ferguson, ...
THE PHILOSOPHY OF PHYSICS
... The doubt is connected with the fact that we cannot imagine how, that we cannot even imagine what it would amount to, to carry out a measurement of the absolute position of any particular particle, or any particular assemblage of particles, in space. The doubt (to put it slightly differently) is co ...
... The doubt is connected with the fact that we cannot imagine how, that we cannot even imagine what it would amount to, to carry out a measurement of the absolute position of any particular particle, or any particular assemblage of particles, in space. The doubt (to put it slightly differently) is co ...
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.