Timeline for Physical meaning of $Tr(\rho ^2)$
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 1, 2021 at 6:00 | vote | accept | biryani | ||
| Apr 3, 2016 at 1:31 | answer | added | SMeznaric | timeline score: 3 | |
| Mar 30, 2016 at 11:52 | review | Close votes | |||
| Mar 31, 2016 at 5:40 | |||||
| Mar 30, 2016 at 11:50 | comment | added | ACuriousMind♦ | It's not clear what you're asking. The inequality is saturated if and only if $\rho$ is pure, what more of a "physical meaning" do you seek? | |
| Mar 30, 2016 at 11:34 | comment | added | Norbert Schuch | One possible interpretation is the overlap of $\rho\otimes \rho$ with the symmetric subspace. Would this be a satisfactory answer?? (After all, $\rho$ has to be pure in order for $\rho\otimes \rho$ to be fully contained in the symmetric subspace.) | |
| Mar 30, 2016 at 11:34 | comment | added | Norbert Schuch | @Adam Note that this quantity can only be measured given at least two copies of $\rho$. | |
| Mar 30, 2016 at 11:34 | comment | added | Norbert Schuch | What do you mean by "physical meaning"? -- Note that one could well argue that $\mathrm{tr}(\rho)$ has no physical meaning, since states must always be normalized. | |
| Mar 30, 2016 at 9:51 | history | tweeted | twitter.com/StackPhysics/status/715114160577708032 | ||
| Mar 30, 2016 at 8:41 | comment | added | Adam | This quantity can be measured experimentally, you might be interested by this paper arxiv.org/pdf/1509.01160v1.pdf | |
| Mar 30, 2016 at 8:02 | history | edited | Qmechanic♦ |
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| Mar 30, 2016 at 7:05 | answer | added | d_b | timeline score: 1 | |
| Mar 30, 2016 at 5:54 | history | asked | biryani | CC BY-SA 3.0 |