Spooky Action at a Distance by George Musser

Author:George Musser
Language: eng
Format: epub
ISBN: 9780374713553
Publisher: Farrar, Straus and Giroux

5.1. Boundary versus bulk. The universe may have a boundary, and if it does, physical processes occurring on the boundary can reproduce everything that is happening within the full volume of space. (Illustration by Jen Christensen)

These peculiar implications are all the more astonishing when you consider their humble origins. Physicists took the simple observation that birds can safely perch on wires, extended it to gravity, and followed the logic where it led them. Gauge invariance, both in electromagnetism and gravitation, indicates a redundancy in our description of nature: multiple values of the electric potential are equivalent ways to describe a given situation; multiple values of the gravitational field correspond to the same relative arrangement of objects. Now we find that an entire dimension of space can be redundant. When space has a boundary, the entire universe can be collapsed onto that boundary, as though the full volume were superfluous. Space is unraveling before our eyes.

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