Scaling laws for precision in quantum interferometry and the bifurcation landscape of the optimal state
Year: 2011
Type: article
Abstract: Phase precision in optimal two-channel quantum interferometry is studied in the limit of large photon number $N\ensuremath{\gg}1$, for losses occurring in either one or both channels. For losses in one channel an optimal state undergoes an intriguing sequence of local bifurcations as the number of photons (or losses) increase. The optimal state has a continuous form in the Fock state basis for large $N$. The loss parameter limits any precision improvement over classical light to at most a constant factor independent of $N$. We determine a crossover value of photon number ${N}_{c}$ beyond which supraclassical precision is progressively lost.
Source: Physical Review A
Institution: Ames Research Center
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1990463130