Timeline for How to write a generic density matrix for multi qubit system
Current License: CC BY-SA 3.0
16 events
| when toggle format | what | by | license | comment | |
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| Jul 7, 2015 at 2:07 | history | edited | DanielSank | CC BY-SA 3.0 |
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| S Jun 19, 2015 at 4:40 | history | bounty ended | advocateofnone | ||
| S Jun 19, 2015 at 4:40 | history | notice removed | advocateofnone | ||
| Jun 19, 2015 at 4:40 | vote | accept | advocateofnone | ||
| Jun 18, 2015 at 21:22 | history | tweeted | twitter.com/#!/StackPhysics/status/611645085311176704 | ||
| Jun 18, 2015 at 19:06 | answer | added | Norbert Schuch | timeline score: 5 | |
| Jun 18, 2015 at 18:55 | comment | added | Norbert Schuch | Talking about the eigenvalues of $T$ probably does not give a criterion: $T$ does not even have to be diagonalizable; and conversely, one can easily write an upper triangular $T$ with zero diagonal (i.e. eigenvalues $0$) which does not describe a positive $\rho$. | |
| Jun 16, 2015 at 8:13 | comment | added | advocateofnone | @NorbertSchuch Yes I am looking for conditions on matrix $T$. The single condition I know about it that maximum eigen value of $T^tT$ should be 1 and I cannot prove even that condition. So basically my question if what conditions are imposed on $T$ if (1) is a valid density matrix. | |
| Jun 16, 2015 at 6:51 | comment | added | Norbert Schuch | What is your question? The conditions on $T$ for 2 qubits or the form of the density matrix for general qubits (and if the latter, what exactly is your question)? | |
| Jun 15, 2015 at 20:00 | history | edited | advocateofnone | CC BY-SA 3.0 |
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| Jun 15, 2015 at 19:45 | history | edited | advocateofnone | CC BY-SA 3.0 |
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| S Jun 15, 2015 at 9:17 | history | bounty started | advocateofnone | ||
| S Jun 15, 2015 at 9:17 | history | notice added | advocateofnone | Draw attention | |
| Jun 14, 2015 at 13:08 | history | edited | Qmechanic♦ |
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| Jun 14, 2015 at 12:57 | history | edited | advocateofnone | CC BY-SA 3.0 |
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| Jun 13, 2015 at 9:16 | history | asked | advocateofnone | CC BY-SA 3.0 |