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This work presents a "Clean Quantum Theory of the Electron," based on Dirac s equation. "Clean" in the sense of a complete mathematical explanation of the well known paradoxes of Dirac s theory, and a connection to classical theory, including the motion of a magnetic moment (spin) in the given field, all for a charged particle (of spin 1/2) moving in a given electromagnetic field. This theory is relativistically covariant, and it may be
regarded as a mathematically consistent quantum-mechanical
generalization of the classical motion of such a particle, a la
Newton and Einstein. Normally, our fields are time-independent, but
also discussed is the time-dependent case, where slightly different
features prevail. A "Schroedinger particle," such as a light
quantum, experiences a very different (time-dependent) "Precise
Predictablity of Observables." An attempt is made to compare both
cases. Mathematically, our tools consist of the study of a pseudo-differential operator (i.e. an "observable") under conjugation with the Dirac propagator: such an operator has a "symbol" approximately propagating along classical orbits, while taking its "spin" along. This is correct only if the operator is "precisely predictable," that is, it must approximately commute with the Dirac Hamiltonian, and, in a sense, will preserve the subspaces of electronic and positronic states of the underlying Hilbert space."
This work presents a Clean Quantum Theory of the Electron, based on Dirac's equation. Clean in the sense of a complete mathematical explanation of the well known paradoxes of Dirac's theory, and a connection to classical theory, including the motion of a magnetic moment (spin) in the given field, all for a charged particle (of spin 1/2) moving in a given electromagnetic field. This theory is relativistically covariant, and it may be regarded as a mathematically consistent quantum-mechanical generalization of the classical motion of such a particle, a la Newton and Einstein. Normally, our fields are time-independent, but also discussed is the time-dependent case, where slightly different features prevail. A Schroedinger particle, such as a light quantum, experiences a very different (time-dependent) Precise Predictablity of Observables. An attempt is made to compare both cases.
The main aim of this book is to introduce the reader to the concept of comparison algebra, defined as a type of C*-algebra of singular integral operators. The first part of the book develops the necessary elements of the spectral theory of differential operators as well as the basic properties of elliptic second order differential operators. The author then introduces comparison algebras and describes their theory in L2-spaces and L2-Soboler spaces, and in particular their importance in solving functional analytic problems involving differential operators. The book is based on lectures given in Sweden and the USA.
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