TY - JOUR AU - Rivas, Ángel AU - Luis Aina, Alfredo PY - 2010 DO - 10.1103/PhysRevLett.105.010403 SN - 0031-9007 UR - https://hdl.handle.net/20.500.14352/44641 T2 - Physical review letters AB - We examine whether metrological resolution beyond coherent states is a nonclassical effect. We show that this is true for linear detection schemes but false for nonlinear schemes, and propose a very simple experimental setup to test it. We find a... LA - eng M2 - 010403_1 PB - American Physical Society KW - Wigner function KW - Phase measurements KW - Heisenberg limit KW - Density-matrices KW - Number KW - States KW - Computation KW - Distance KW - Space TI - Precision quantum metrology and nonclassicality in linear and nonlinear detection schemes TY - journal article VL - 105 ER -