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Images of TimeMind, Science, Reality$
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George Jaroszkiewicz

Print publication date: 2016

Print ISBN-13: 9780198718062

Published to Oxford Scholarship Online: January 2016

DOI: 10.1093/acprof:oso/9780198718062.001.0001

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Time travel

Time travel

Chapter:
(p.214) 20 Time travel
Source:
Images of Time
Author(s):

George Jaroszkiewicz

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198718062.003.0020

This chapter discusses the relationship of information flow to time travel. The issues with retarded and anticipatory equations of motion are reviewed, with commentary on prediction and retrodiction. The chapter discusses tachyons and spreadsheet mechanics. The latter gives a simple, effective, and accessible formalism that can be readily used by the general reader to explore not only the relationship of light-cone structure in relativity to differential equations, but also the paradoxes associated with time travel. It discusses the famous Gödel metric in general relativity, looking at its physical and geometrical characteristics, notably the occurrence of closed timelike curves, or loops in time.

Keywords:   time travel, information flow, retarded equations, anticipatory equations, prediction, retrodiction, tachyons, spreadsheet mechanics, Gödel metric, closed timelike curves

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