Quantum Manipulation of Two-Electron Spin States in
... system with a two-pulse procedure: one microsecond pulse that is varied over the dashed green rectangular region depicted in Fig. 2(b) and a fast fixed negative pulse to the gate L of 50 ns duration and of amplitude V ns equal to 80 mV; finally, we proceed to the spin measurement in bringing the sys ...
... system with a two-pulse procedure: one microsecond pulse that is varied over the dashed green rectangular region depicted in Fig. 2(b) and a fast fixed negative pulse to the gate L of 50 ns duration and of amplitude V ns equal to 80 mV; finally, we proceed to the spin measurement in bringing the sys ...
Formal Theory of Green Functions
... which describes one-particle (or one-hole) propagations in a medium. To describe two or more particle propagations, we would necessitate the twoor many-particle Green function which will be defined in the next section. In interacting systems the Green functions obey the very complicated equations, i ...
... which describes one-particle (or one-hole) propagations in a medium. To describe two or more particle propagations, we would necessitate the twoor many-particle Green function which will be defined in the next section. In interacting systems the Green functions obey the very complicated equations, i ...
4 Theory of quantum scattering and chemical reactions
... harpoon mechanism are usually associated with large cross sections, σR ≈ 125 Åin the case of K + I2 . Scheme 2: CH3 I + K → KI + CH3 , Fig. 4.8: the KI product is mainly scattered to the backward hemisphere. As in scheme 1, the product angular distribution is forwardbackward asymmetric which indica ...
... harpoon mechanism are usually associated with large cross sections, σR ≈ 125 Åin the case of K + I2 . Scheme 2: CH3 I + K → KI + CH3 , Fig. 4.8: the KI product is mainly scattered to the backward hemisphere. As in scheme 1, the product angular distribution is forwardbackward asymmetric which indica ...
Quantum error correcting codes and Weyl commutation relations
... for all ρ̂ of the form (1.1). Then the pair (C, R) is called a quantum N -correcting code. If a subspace C admits a recovery operation R so that (C, R) is a quantum N -correcting code we then say that C, or equivalently, the orthogonal projection P on C is a quantum N -correcting code. The dimension ...
... for all ρ̂ of the form (1.1). Then the pair (C, R) is called a quantum N -correcting code. If a subspace C admits a recovery operation R so that (C, R) is a quantum N -correcting code we then say that C, or equivalently, the orthogonal projection P on C is a quantum N -correcting code. The dimension ...
www.osa-opn.org 36 | OPN Optics & Photonics News Illustration by Phil Saunders/ spacechannel.org
... In the case of polarization, the source must be explicitly Spontaneous parametric processes are not the only mechadesigned so that two amplitudes exist that cannot be resolved nisms for generating non-classical light. Single photons into factors, leading to quantum entanglement. A popular may be cre ...
... In the case of polarization, the source must be explicitly Spontaneous parametric processes are not the only mechadesigned so that two amplitudes exist that cannot be resolved nisms for generating non-classical light. Single photons into factors, leading to quantum entanglement. A popular may be cre ...
Optical Properties of Low Dimensional Semiconductor Materials
... about the properties of matter through many different spectroscopies that cover a wide range of wavelengths. This dissertation presents a serial study about the optical properties of different semiconductor materials. It is motivated by the fact that semiconductors are extremely important in modern ...
... about the properties of matter through many different spectroscopies that cover a wide range of wavelengths. This dissertation presents a serial study about the optical properties of different semiconductor materials. It is motivated by the fact that semiconductors are extremely important in modern ...
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.