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Jul 18 at 7:13 comment added Sanjana I am not sure about this but does string theory with $g_s=0$ count given that such systems have an upper limit of temperature called the Hagedorn temperature and $E_{\text{Hagedorn}}=k_B T_{\text{Hagedorn}}$?
Jun 13 at 14:47 comment added Roman The Sturm–Liouville theorem states quite generally that for this class of problems (Hamiltonians etc.) there is a minimum, but no maximum, eigenvalue.
Jun 13 at 9:40 answer added LPZ timeline score: 7
Jun 13 at 8:02 comment added Norbert Schuch ... information, and so forth. This goes back to the work of Holevo (and probably others) in the 70ies, before it was called quantum information.
Jun 13 at 8:02 comment added Norbert Schuch Regarding "phenomonological restrictions", in quantum information (or maybe better mathematical physics?) one has to limit the energy in the system, in order to get well-behaved quantities such as channel capacities. (One typically bounds sth. like the average energy, rather than the maximum energy, and the bound itself is arbitrary, and the e.g. capacities one obtains will depend on the bound on chooses. It is basically capturing the idea that you are willing to invest a certain amount of energy into your system; depending on that amount, there is a rate at which you can transmit ...
Jun 12 at 22:56 vote accept Sanjana
Jun 12 at 9:21 history became hot network question
Jun 12 at 7:24 comment added Quillo Related: physics.stackexchange.com/q/366314/226902 physics.stackexchange.com/q/164690/226902 physics.stackexchange.com/q/192403/226902
Jun 12 at 6:02 answer added 11zaq timeline score: 6
Jun 12 at 5:54 answer added Valter Moretti timeline score: 15
Jun 12 at 1:34 answer added Connor Behan timeline score: 2
Jun 12 at 1:25 history edited Qmechanic
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Jun 12 at 1:20 history asked Sanjana CC BY-SA 4.0