67 research outputs found
Use as stabilizers of perfluoropolyether oils at high temperatures, higher than 200°C, of compounds not containing phosphorrocess.
No full textUse as stabilizers of perfluoropolyether oils at high temperatures, higher than 200° C, of compounds not containing phosphor and having the general formula (A): wherein: X, Y, X', Y', equal to or different, are indenpendently the one from the other H; NO2; C1-C4 alkyl; C1-C4 alkoxy, preferably methoxy group; Z = -CH2-; > C=0 (carbonyl); m and n are integers such that m is in the range 0-80, extremes included; n is in the range 0-20, extremes included, m+n being > 1; the molecular weight of the perfluoropolyether part (units with indexes m and n) being from 500 to 10,000, preferably from 1,000 to 4,000. Also published as: EP1354932 (A1), US7081440 (B2), US2003203823 (A1), JP2003327985 (A), EP1354932 (B1
Stabilisers for perfluoropolyethers oils
No full textUse as stabilizers of perfluoropolyether oils at high temperatures, higher than 200 DEG C., of compounds not containing phosphor and having the general formula (A)
Teleportation transfers only speakable quantum information
No full textWe show that a quantum clock can not be teleported without prior synchronization between sender and receiver: every protocol using a finite amount of entanglement and an arbitrary number of rounds of classical communication will necessarily introduce an error in the teleported state of the clock. Nevertheless, we show that entanglement can be used to achieve synchronization with precision higher than any classical correlation allows, and we give the optimized strategy for this task. The same results hold also for arbitrary continuous quantum reference frames, which encode general unspeakable information, information that can not be encoded into a number, but instead requires a specific physical support, such as a clock or a gyroscope, to be conveyed. © 2012 American Physical Society.link_to_subscribed_fulltex
Classical Capacity of the lossy bosonic channel: the exact solution
No full textThe classical capacity of the lossy bosonic channel is calculated exactly. It is shown that its Holevo information is not superadditive, and that a coherent-state encoding achieves capacity. The capacity of far-field, free-space optical communications is given as an example
- …
