Physics – Quantum Physics
Scientific paper
2009-06-15
Physics
Quantum Physics
Here we detail the progress in attacking the minimum output entropy conjecture with an infinitesimal thermalizing map approach
Scientific paper
We introduce a new form for the bosonic channel minimal output entropy conjecture, namely that among states with equal input entropy, the thermal states are the ones that have slightest increase in entropy when sent through a infinitesimal thermalizing channel. We then detail a strategy to prove the conjecture through variational techniques. This would lead to the calculation of the classical capacity of a communication channel subject to thermal noise. Our strategy detects input thermal ensembles as possible solutions for the optimal encoding of the channel, lending support to the conjecture. However, it does not seem to be able to exclude the possibility that other input ensembles can attain the channel capacity.
Cerf Nicolas J.
Garcia-Patron Raul
Giovannetti Vittorio
Guha Saikat
Lloyd Seth
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