Details

Autor(en) / Beteiligte

• Wang, J Z
• Yang, Z Q
• Chen, A X
• Yang, W
• Jin, G R

Titel

Multi-outcome homodyne detection in a coherent-state light interferometer

Ist Teil von

• Optics express, 2019-04, Vol.27 (7), p.10343-10354

Ort / Verlag

United States

Erscheinungsjahr

2019

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The Cramér-Rao bound plays a central role in both classical and quantum parameter estimation, but finding the observable and the resulting inversion estimator that saturates this bound remains an open issue for general multi-outcome measurements. Here we consider multi-outcome homodyne detection in a coherent-light Mach-Zehnder interferometer and construct a family of inversion estimators that almost saturate the Cramér-Rao bound over the whole range of phase interval. This provides a clue on constructing optimal inversion estimators for phase estimation and other parameter estimation in any multi-outcome measurement.