Commutation relations

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Does the usual commutation relations, e.g. between position and momentum, remains valid in relativistic quantum mechanics?
 

Meir Achuz

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Yes in one particle RQM like the Dirac equation.
But things get more complicated in QFT.
 

dextercioby

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No, because there's no such thing as time operator in quantum mechanics.

Daniel.
 
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As far as I'm aware, there's no such thing as a time operator in field theory. My understanding was that, for field theory, they demoted position to a parameter like time, and promoted the wave equation to the status of an operator.
 

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