Beltrán, JoséLuis Aina, Alfredo2023-06-202023-06-202005-10-031050-294710.1103/PhysRevA.72.045801https://hdl.handle.net/20.500.14352/51499©2005 The American Physical Society. A.L. thanks Professor J. Dunningham for valuable comments.We analyze the performance of nonlinear detection schemes surpassing the Heisenberg limit with semiclassical input states when using realistic detectors having nonunit detection efficiency.engBreaking the Heisenberg limit with inefficient detectorsjournal articlehttp://dx.doi.org/10.1103/PhysRevA.72.045801http://journals.aps.org/open access535Electromagnetically induced transparencyQuantum-mechanical noiseInterferometric measurementsPrecision-measurementFisher informationProjection noiseCoherent statesWave detectorsSqueezed-lightPhaseÓptica (Física)2209.19 Óptica Física