adiabatic perturbation theory in quantum dynamics

... introductory chapter. In order to get a feeling for adiabatic problems in quantum mechanics and for the concepts involved in their solution, we recall in Section 1.1 the adiabatic theorem of quantum mechanics” ... sharing their insights on adiabatic problems with me and for their interest in and sup- port of my work. Important parts of the research contained in Chapter 3...

Ngày tải lên: 24/04/2014, 17:12

Ngày tải lên: 17/03/2014, 14:38

... still present in the two-dimensional theory, and the theory is in a certain sense maximal quantum: from (33) it is seen that each equivalence class of metrics is included in the path integral with ... problem of defining genuine reparameterization in- variant observables in quantum gravity is present in two dimensional quantum gravity as well. Here we will discuss the so-c...

Ngày tải lên: 17/03/2014, 14:39

... principle of least action can be understood in terms of the path integral formulation of quantum mechanics and a corresponding principle of stationary phase. 3 Perturbation theory, the scattering ... diagrammatically in figure 8. In this figure, we use the following Feynman rules: 1. Each line is connected to a sink and a source. 2. Each sink or a source is labeled with a spacetime p...

Ngày tải lên: 24/04/2014, 17:10

... characterized by the same quantum numbers such as mass, charge and spin, are in principle indistinguishable. From the indistinguishability of particles follows that if two coordinates in an N- particle ... the quantum label ν can contain both discrete and continuous quantum numbers. In that case the symbol  ν is to be interpreted as a combination of both summations and integratio...

Ngày tải lên: 24/04/2014, 17:13

... physical point of view and still mathematically interesting since, in particular, they display Bose condensation in infinite time. These are the equations describing boson-fermion interactions ... Bose-Einstein entropy) since it would not have physical meaning. In Section 5 we discuss the entropy problem for a gas constituted of electrons and photons. 2.1 Relativistic non quantum gas...

Ngày tải lên: 24/04/2014, 17:14

Ngày tải lên: 24/04/2014, 17:17

Ngày tải lên: 24/04/2014, 17:18

... economic – during the period. My ulti- mate interest lies in the way the interaction of these forms produces by the century’s end an idea of poetry as having a distinct and distinctive aes- thetic ... capital for another (e.g. investing money in education in hopes of making connec- tions or getting a better job) or they may denigrate the value of alternate forms of capital while praisin...

Ngày tải lên: 21/09/2012, 10:46

...  The space in front of the speaker indicates the future time. d. d. Present Continuous Present Continuous  To talk about things that are happening now. Things are still doing now.  “ ... You are playing soccer.”  Rotating your hands in the location of the speaker indicates the present continuous. e. e. Past Continuous Past Continuous  To say that somebody was in the...

Ngày tải lên: 05/09/2013, 21:10