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Apr 16 at 22:01 vote accept Ad infinitum
Mar 18 at 20:13 comment added user196574 There's an important mistake in this question. The $P_n = |n\rangle \langle n|$ are generically extremely non-local and generically cannot be written as a sum of few-body terms.
Mar 18 at 19:51 comment added Jules Lamers By now duplicated by physics.stackexchange.com/q/801154 , where I have a related answer; but perhaps both are of use, so I'll keep them
Jan 9 at 1:44 answer added Jules Lamers timeline score: 2
Sep 23, 2023 at 22:45 history edited Qmechanic
edited tags; edited tags
Sep 23, 2023 at 18:49 history asked Ad infinitum CC BY-SA 4.0