Sharif Digital Repository

The idea of "vacuum energy" with definition of the "Aether" has many historical backgrounds from Aristotelian philosophy to 19th century and the advent of quantum vacuum. Some assert vacuum which is defined as "pure void" and others have got contrary viewpoints. It can be said that the history of vacuum is as old as history of physics. With the advent of quantum mechanics, vacuum has taken a specific definition. Vacuum from vision of quantum mechanics describes that vacuum is the minimum possible energy state, because if the energy of "quantum vacuum state" became zero, Heisenberg uncertainty principle would be violated. The important consequence of quantum mechanics will be in apparent... 

This project examines time in quantum mechanics, which includes three chapters. The first chapter is about clocks, which first deals with the history and invention of clocks, and then goes on to describe quantum clocks and various theories about them, including Perez and Faraday quantum clocks . The second chapter deals with the two-slit Yang experiments which, as in the preceding chapter, we first give a historical description of the experiment, and we will continue with our description. We consider that for each of these cases the probability of spatial and linear momentum interference is calculated. The third chapter is the final chapter. In this section, we first discuss the concept of...