Time in the Quantum World

Klaus Mainzer

Tim Maudlin

Marcin Skulimowski

Kim Jeong Hee

All quantum are waves and particles have complementarity. According to the decoupling theory, what is the criterion is the interaction that causes decoherence. When it is in a state of coherence, it is in a state of superposition with the property of a wave, and when it interacts to cause a decoherence, it has a property of a particle. This is a thesis about the reason. In this paper, decoherence creates time, and this is explained by the discontinuity of space-time. Because in the microscopic world, according to quantum gravity, the variable time cannot be used, and it is argued that there is no time. On the other hand, the variable “time” is used for the physical quantity in the macro world. In other words, the macro world thinks that there is time and is a definite physical quantity. Then, what is the criterion for dividing the micro-world in which time does not exist and the macro-world in which time exists? In this paper, decoherence is considered as the criterion. In other words, in the state of coherence without interaction, time does not flow and has no meaning. Complementarity was explained by using this concept and the discontinuity of time claimed by quantum gravity The standard by which the micro world and the macro world are divided is Decoherence.

Rod Girle

Introduction There is an interpretation of quantum physics that is known as the many worlds interpretation . The interpretation is not, by any means, a majority view, but it is much discussed, and is much beloved by authors of fiction, especially the authors of science fiction. In this chapter we will look at the many worlds interpretation from the perspective of possible worlds. Our considerations will be much assisted if we begin by looking at time from a possible worlds perspective. There are logics for time that have been developed on the basis of standard modal logics with possible world semantics. These logics provide an interesting background for the discussion of the many worlds interpretation of quantum physics, as we shall see. Possible worlds and time States of the universe at any point in history can be seen as possible worlds. Such states are sometimes called “time-slices”, but we will call them “instant states”. The state of the universe at one particular instant state, say right now , could be seen as possible world n . World n is the possible world in which it is true that you are reading this book, the Earth is orbiting the Sun, and the Sun is in the Milky Way galaxy. The state at the next instant can be seen as possible world k , the next after that as possible world l . Earlier instant states are before the later instant states; later instant states are after the earlier ones.