We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
State Measurement by Photon Filtering in a Ring Cavity.
- Authors
D'Ariano, G. M.; Maccone, L.; Paris, M. G.; Sacchi, M. F.
- Abstract
We suggest a method for measuring the photon number distribution and the density matrix of a single-mode radiation field. The setup consists of a chain of active ring cavities, each fed by a strong coherent probe and coupled to the signal through crossKerr phase modulation. Each cavity is set at resonance by a different Fock component of the signal, so that the detection probability at the cavities output is proportional to the signal photon statistics. The off-diagonal elements of the density matrix can be evaluated by measuring the photon statistics of a set of displaced signal states. The suggested setup allows a reliable state measurement even with low quantum efficiency at detectors.
- Subjects
PHOTONS; PHOTOELECTRONS
- Publication
Modern Physics Letters B, 2000, Vol 14, Issue 1, p15
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S0217984900000045