Emergence in Condensed Matter and Quantum Gravity by George Musser

Author:George Musser
Language: eng
Format: epub
ISBN: 9783031098956
Publisher: Springer International Publishing

The operative geometric rules are a bit more involved than those we learn in school, because they are not merely spatial but also temporal. Although this chapter focuses on space, always in the background is that space and time are twin aspects of a unified structure, spacetime. The combination of space and time into a unified structure means that the universe has a fundamental unit of velocity. Physicists call this the speed of light, and it is an inevitable consequence of the fungibility of space and time. You can maintain light speed only if you begin at light speed. That is of little practical use to space travelers accelerating from slower velocities; thus the speed of light is not just a fundamental unit of velocity, but also a fundamental limit to velocity. This limit has crucial consequences for the structure of space, as we shall we.

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