Read e-book online Classical And Quantum Dissipative Systems PDF

By Mohsen Razavy

ISBN-10: 1860945309

ISBN-13: 9781860945304

This e-book discusses matters linked to the quantum mechanical formula of dissipative platforms. It starts off with an introductory assessment of phenomenological damping forces, and the development of the Lagrangian and Hamiltonian for the damped movement. it truly is proven, as well as those tools, that classical dissipative forces is usually derived from solvable many-body difficulties. a close dialogue of those derived forces and their dependence on dynamical variables can also be provided. the second one a part of this booklet investigates using classical formula within the quantization of dynamical structures lower than the impact of dissipative forces. the consequences express that, whereas a passable method to the matter can't be stumbled on, diversified formulations characterize varied approximations to the full resolution of 2 interacting platforms. The 3rd and ultimate a part of the booklet specializes in the matter of dissipation in interacting quantum mechanical platforms, in addition to the relationship of a few of those types to their classical opposite numbers. a couple of very important purposes, corresponding to the idea of heavy-ion scattering and the movement of a radiating electron, also are mentioned.

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H. Good Jr. J. Nelson, Classical Theory of Electric and Magnetic Fields, (Academic Press, New York, 1971) p. 509. [23] A. Corney, Atomic and Laser Spectroscopy, (Oxford University Press, London, 1977) Chapter 8. [24] C. D. A. Y. 1962) p. 188. [25] See for instance R. J. 1963) p. 207. [26] D. Hesteness, New Foundations for Classical Mechanics, (D. Reidel Publishing Company , 1986, Dordrecht) p. 140. M. Y. 1983) p. 2. Chapter 3 Lagrangian Formulations In this chapter we want to review the canonical formulation of the simplest forms of dissipative systems.

Here we want to find the Hamiltonian for the three-dimensional motion of an electron subject to the potential V(q, i), where the equations of motion are given by [13] [14] d2Xi m T\2 d3Xi IF + { 2) ~dF fd4Xi dV [IF dxi' 1,2,3. 56) ^ . )E^ 2 2i N exp V(q,t). 57) For other a t t e m p t s to formulate the Lagrangian and the Hamiltonian for a radiative electron see Infeld [15] and also Englert [16]. In the latter work, using Ostrogradsky's method the Hamiltonian for the third order equation of motion is constructed and then quantized.

37) is a special case of L satisfying Eq. 39) for conservative systems is well-known [15]. When the system is not conservative then we may or may not have Lagrangians and when we have, then the Lagrangian is not unique. Construction of the Lagrangian 21 For the equations of motion of second order the question of existence of the Lagrangian and its dependence on the number of degrees of freedom has been studied by a number of authors [3] [16]-[18]. If the motion is one-dimensional, we can always find a Lagrangian whose variational derivative yields the equation of motion.

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Classical And Quantum Dissipative Systems by Mohsen Razavy


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