Several recent arguments purport to show that there can be no relativistic, quantum-mechanical theory of localizable particles and, thus, that relativity and quantum mechanics can be reconciled only in the context of quantum field theory. We point out some loopholes in the existing arguments, and we provide two no-go theorems to close these loopholes. However, even with these loopholes closed, ...

Several recent arguments purport to show that there can be no relativistic, quantum-mechanical theory of localizable particles and, thus, that relativity and quantum mechanics can be reconciled only in the context of quantum field theory. We point out some loopholes in the existing arguments, and we provide two no-go theorems to close these loopholes. However, even with these loopholes closed, ...

This paper is a progress report on the foundations for the canonical proper-time approach to relativistic quantum theory. We first review the the standard square-root equation of relativistic quantum theory, followed by a review of the Dirac equation, providing new insights into the physical properties of both. We then introduce the canonical proper-time theory. For completeness, we give a brie...

The process of teleportation of a completely unknown one-particle state of a free relativistic quantum field is considered. In contrast to the non-relativistic quantum mechanics, the telepor-tation of an unknown state of the quantum field cannot be in principle described in terms of a measurement in a tensor product of two Hilbert spaces to which the unknown state and the state of the EPR-pair ...

A summary of some lines of ideas leading to model-independent frameworks of relativistic quantum field theory is given. It is followed by a discussion of the ReehSchlieder theorem and geometric modular action of Tomita-Takesaki modular objects associated with the quantum field vacuum state and certain algebras of observables. The distillability concept, which is significant in specifying useful...

1. Relativistic Quantum Mechanics, 1926 . . . . . . . . . . . . . . . . . . . 32 2. P.A.M. Dirac: Methodology and Cultural Background . . . . . . . . . . . . 38 3. Relativity in Dirac's Earlier Works . . . . . . . . . . . . . . . . . . . . 40 4. Spin and Quantum Mechanics . . . . . . . . . . . . . . . . . . . . . . 44 5. Towards a Relativistic Theory . . . . . . . . . . . . . . . . . . . . . . ...

1 Quantum Field Theory ( QFT ) Why We Need It? 7 1.1 Two Flavors of QFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.2 QFT as a Special Application of Quantum Mechanics . . . . . . . . . . . . . 8 1.3 QFT as a Fundamentally New Physics Relativistic Multiparticle Quantum Physics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.3.1 QFT as conven...

We present some informal remarks on aspects of relativistic quantum computing. The continuing miniaturization of electronic circuitry has forced designers of computer chips to deal with all of the complications that are entailed in using Quantum Mechanics. Meanwhile, physicists have identified dramatic new possibilities for increases in computer performance by making use of such uniquely quantu...

Bell appealed to the theory of relativity in formulating his principle of local causality. But he maintained that quantum …eld theories do not conform to that principle, even when their …eld equations are relativistically covariant and their observable algebras satisfy a relativistically motivated microcausality condition. A pragmatist view of quantum theory and an interventionist approach to c...