نتایج جستجو برای: relativistic quantum theory
تعداد نتایج: 1026385 فیلتر نتایج به سال:
The possibility that quantum mechanics itself could be non-linear has run up against difficulties with relativistic covariance. Most of the schemes proposed up to now engender superluminal communication, and those that don’t, have been equivalent to linear theories. We show in a simplified model that a proposal based on the consistent histories approach to quantum mechanics avoids the usual dif...
This is an introduction to spacetime algebra (STA) as a unified mathematical language for physics. STA simplifies, extends and integrates the mathematical methods of classical, relativistic and quantum physics while elucidating geometric structure of the theory. For example, STA provides a single, matrixfree spinor method for rotational dynamics with applications from classical rigid body mecha...
Quantum physics allows for unconditionally secure communication between parties that trust each other. However, when the parties do not trust each other such as in the bit commitment scenario, quantum physics is not enough to guarantee security unless extra assumptions are made. Unconditionally secure bit commitment only becomes feasible when quantum physics is combined with relativistic causal...
Abstract: The present work shows that through a suitable change of variables relativistic dynamics can be mapped to light propagation in a non-homogeneous medium. A particle’s trajectory through the modified space-time is thus formally equivalent to a light ray and can be derived from a mechanical equivalent of Fermat’s principle. The similarities between light propagation and mechanics are the...
1.1. It embodies deep and beautiful principles. These are, first of all, the general principles of quantum mechanics, special relativity, and locality, that lead one to relativistic quantum field theory [1]. In addition, we require invariance under the nonabelian gauge symmetry SU(3), the specific matter content of quarks – six spin 1/2 Dirac fermions which are color triplets – and renormalizab...
1.1. It embodies deep and beautiful principles. These are, first of all, the general principles of quantum mechanics, special relativity, and locality, that lead one to relativistic quantum field theory [1]. In addition, we require invariance under the nonabelian gauge symmetry SU(3), the specific matter content of quarks – six spin 1/2 Dirac fermions which are color triplets – and renormalizab...
The cross-section for threshold π0 production in proton-proton collisions is evaluated in the framework of the covariant spectator description. The negative energy intermediate states are included non-perturbatively and seen to yield a considerably smaller contribution, when compared to perturbative treatments. A family of OBE-models with different off-shell scalar coupling is considered. Types...
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