TOPICS IN QUANTUM NANOSTRUCTURE PHYSICS: SPIN-ORBIT EFFECTS AND FAR-INFRARED RESPONSE TEMES DE F´
... the three spatial components of the density, which in addition is a simpler both conceptually and practically quantity to deal with. On the other hand, the exchange-correlation part of the electron-electron interaction, neglected or only partially taken into account in the above-mentioned approaches ...
... the three spatial components of the density, which in addition is a simpler both conceptually and practically quantity to deal with. On the other hand, the exchange-correlation part of the electron-electron interaction, neglected or only partially taken into account in the above-mentioned approaches ...
![arXiv:1312.4758v2 [quant-ph] 10 Apr 2014](http://s1.studyres.com/store/data/021352507_1-d587dd4045ccae4ae6a47bb17173f358-300x300.png)
The role of elementary particle accelerators
... Powerful limitation due to the Liouville’s theorem Already at MURA in the fifties it was realised that some beam phase-space compression may be often necessary going from the source to the collision point. The Liouville theorem states that whenever there is an Hamiltonian (i.e. any force deriva ...
... Powerful limitation due to the Liouville’s theorem Already at MURA in the fifties it was realised that some beam phase-space compression may be often necessary going from the source to the collision point. The Liouville theorem states that whenever there is an Hamiltonian (i.e. any force deriva ...
electrons in atoms
... classical physics—to fields such as chemistry and biology. Only a few fundamental problems remained, including an explanation of certain details of light emission and a phenomenon known as the photoelectric effect. But the solution to these problems, rather than marking an end in the study of physic ...
... classical physics—to fields such as chemistry and biology. Only a few fundamental problems remained, including an explanation of certain details of light emission and a phenomenon known as the photoelectric effect. But the solution to these problems, rather than marking an end in the study of physic ...
![arXiv:math/0606118v4 [math.PR] 5 Dec 2006](http://s1.studyres.com/store/data/013514025_1-1bac3cda767b4b11f4a6d27e549df5b9-300x300.png)
Noise and Decoherence in Quantum Two-Level Systems
... including a discussion how these processes are induced by specific quantum manipulations. We also present some exact results, shedding light on the important question of low-temperature dephasing. This analysis, as well as the rest of this article are applicable to any quantum two-state system subjec ...
... including a discussion how these processes are induced by specific quantum manipulations. We also present some exact results, shedding light on the important question of low-temperature dephasing. This analysis, as well as the rest of this article are applicable to any quantum two-state system subjec ...
Modelling the electron and hole states in semiconductor
... levels, which is the case in the valence band of diamond and zinc-blende semiconductors, is then presented. By using the perturbation theory, the three-band Dresselhaus-KipKittel model of the valence-band states is derived for the case of absent spin-orbit interaction. The spin-orbit interaction is ...
... levels, which is the case in the valence band of diamond and zinc-blende semiconductors, is then presented. By using the perturbation theory, the three-band Dresselhaus-KipKittel model of the valence-band states is derived for the case of absent spin-orbit interaction. The spin-orbit interaction is ...
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.