A new approach to foundational problems of quantum mechanics related to applications in quantum technologies and interpretations of signals of various origins

One finds that matters of interpretation of quantum theory, that have for decades been regarded by physicists as „mere matters of philosophy“, can lead to very significant physical effects, some even having important current commercial implications, such as quantum cryptography, and others having more remote potentialities, such as quantum computation. We will investigate the possibilities which the formulation of quantum mechanics in phase space, together with other approaches, can give in an elucidation of open questions from this class of problems, both those of fundamental character and those with more practical implications. With a help of this formulation we will give an original definition of quantum states which behave classically, which opens new ways for understanding of a broad border region between quantum and classical world. Special attention will be paid to the theory of decoherence which will be applied in an analysis of typical bioprocesses in big biomolecules – proteins. The possibilities of phase space description in quantum mechanics will also be used in the general analysis of signals of various nature and origin. As descriptions of the same physical system based on different approaches and conventions may give results and insights characteristic for them individually, we will use this fact in an investigation of the results of the Special Theory of Relativity which are independent of conventions, unavoidable in any descriptions of physical processes.