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chronon
A chronon is a proposed quantum of time, that is, a discrete and indivisible "unit" of time as part of a hypothesis that proposes that time is not continuous.
==Early work==
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 in 1927.〔Lévi 1927〕 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 Chen Ning Yang in 1947.〔Yang 1947〕 Henry Margenau in 1950 suggested that the chronon might be the time for light to travel the classical radius of an electron.〔Margenau 1950〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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