No - space and time are continuous in quantum mechanics, despite the fact that other quantities such as angular momentum and energy are discrete (quantized). Re

No - space and time are continuous in quantum mechanics, despite the fact that other quantities such as angular momentum and energy are discrete (quantized). Relevant comment from Luboš Motl, a string theorist who produced a proof that, under some assumptions, quantum mechanics on discrete space and time is inconsistent, echoed by Peter Shor: https://physics.stackexchange.com/a/9077 https://physics.stackexchange.com/a/9077