It’s not ‘all’ things that are possible, just things that are allowed within the laws of physics :)

Subtle difference, but energy conservation for example has to be adhered to.

Yes, and in a more general way Noether thm applies in QM/QFT as well (energy conservation is just a special case). Symmetries become operators acting on the Hilbert/Fock space (ie representation).

With the caveats: - anomalies-> symmetries/conservation broken by quantum noise (has to be cancelled in valid theories) - Heisenberg’s incertitude

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shiandow 2 hours ago | parent | prev | next [-]

In quantum mechanics? Energy conservation is not as strict as you might think.

It just somehow always balances out in the end.

	▲	dbvdh an hour ago \| parent [-]
		I know, there's some tricky business with energy conservation (I'm not pretending I understand it all though). It is for me an easy analogy though. Even Hilbert space has to stick to some rules!

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lolakutty 2 hours ago | parent | prev [-]

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