Timeline for How is measurement modelled when using the density operator?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Aug 31, 2018 at 19:58 | comment | added | DaftWullie | @ahelwer no, because the measurement operators need not have rank 1. And eigenvalues are irrelevant in this case. The subscripts are arbitrary labels that you are free to pick. You are correct about the multi qubit measurement. | |
| Aug 31, 2018 at 19:47 | vote | accept | ahelwer | ||
| Aug 31, 2018 at 19:46 | comment | added | ahelwer | Thanks! Are the measurement operators $P_i$ always the outer product of the eigenvectors of the measurement observable, and subscripted with the eigenvalue? Also to clarify in the multi-qbit state, say to measure the middle qbit of a 3-qbit system $P_0$ would be $\mathbb{I}_2⊗|0\rangle\langle0|⊗\mathbb{I}_2$? | |
| Aug 31, 2018 at 19:29 | history | edited | DaftWullie | CC BY-SA 4.0 |
added 46 characters in body
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| Aug 31, 2018 at 19:10 | history | answered | DaftWullie | CC BY-SA 4.0 |