TY  - JOUR
AU  - Rivas Vargas, Ángel
AU  - Luis Aina, Alfredo
PY  - 2012
DO  - 10.1088/1367-2630/14/9/093052
SN  - 1367-2630
UR  - https://hdl.handle.net/20.500.14352/44589
T2  - New journal of physics
AB  - We provide evidence that the uncertainty in detection of small and deterministic phase-shift deviations from a working point can be lower than the Heisenberg bound, for a fixed finite mean number of photons. We achieve that by exploiting nonlinearity...
LA  - eng
PB  - IOP Publishing
KW  - Quantum
KW  - Likelihood
KW  - Limit
KW  - Statistics
TI  - Sub-Heisenberg estimation of non-random phase shifts
TY  - journal article
VL  - 14
ER  -