Signal detection without finite-energy limits to quantum resolution



Downloads per month over past year

Luis Aina, Alfredo (2013) Signal detection without finite-energy limits to quantum resolution. Annals of physics, 331 . pp. 1-8. ISSN 0003-4916

[thumbnail of Luis,A07preprint.pdf]

Official URL:


We show that there are extremely simple signal detection schemes where the finiteness of energy resources places no limit on the resolution. On the contrary, larger resolution can be obtained with lower energy. To this end the generator of the signal-dependent transformation encoding the signal information on the probe state must be different from the energy. We show that the larger the deviation of the probe state from being the minimum-uncertainty state, the better the resolution.

Item Type:Article
Additional Information:

© 2012 Elsevier Inc. A.L. acknowledges Drs. A. Rivas and M.J.W. Hall for enlightening comments. This work was supported by Project No. FIS2008-01267 of the Spanish Direccion General de Investigacion del Ministerio de Ciencia e Innovacion, and from Project QUITEMAD S2009-ESP-1594 of the Consejeria de Educacion de la Comunidad de Madrid.

Uncontrolled Keywords:Quantum metrology; Quantum limits; Uncertainty relations
Subjects:Sciences > Physics > Optics
ID Code:30246
Deposited On:21 May 2015 15:05
Last Modified:22 May 2015 11:09

Origin of downloads

Repository Staff Only: item control page