Signal detection without finite-energy limits to quantum resolution [PDF]
Alfredo LuisWe show that there are extremely simple signal detection schemes where the finiteness of energy resources places no limit to the resolution. On the contrary, larger resolution can be obtained with lesser energy. This holds when the generator of the signal-dependent transformation encoding the signal information on the probe state is different from the energy observable.View original: http://arxiv.org/abs/1203.4325
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