出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/04/27 01:06 UTC 版)
A chronon is a proposed quantum of time, that is, a discrete and indivisible "unit" of time as part of a theory that proposes that time is not continuous. While time is a continuous quantity in both standard quantum mechanics and general relativity, many physicists have suggested that a discrete model of time might work, especially when considering the combination of quantum mechanics with general relativity to produce a theory of quantum gravity. The term was introduced in this sense by Robert Lévi. Henry Margenau suggested that the chronon might be the time for light to travel the classical radius of an electron. A quantum theory in which time is a quantum variable with a discrete spectrum, and which is nevertheless consistent with special relativity, was proposed by C. N. Yang.