Multimode model for projective photon-counting measurements
- Laboratoire Charles Fabry de l'Institut d'Optique, CNRS UMR 8501, Universite Paris Sud XI, 91127 Palaiseau (France)
- Niels Bohr International Academy, Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen (Denmark)
- QUANTOP, Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen (Denmark)
We present a general model to account for the multimode nature of the quantum electromagnetic field in projective photon-counting measurements. We focus on photon-subtraction experiments, where non-Gaussian states are produced conditionally. These are useful states for continuous-variable quantum-information processing. We present a general method called mode reduction that reduces the multimode model to an effective two-mode problem. We apply this method to a multimode model describing broadband parametric down-conversion, thereby improving the analysis of existing experimental results. The main improvement is that spatial and frequency filters before the photon detector are taken into account explicitly. We find excellent agreement with previously published experimental results, using fewer free parameters than before, and discuss the implications of our analysis for the optimized production of states with negative Wigner functions.
- OSTI ID:
- 21313324
- Journal Information:
- Physical Review. A, Vol. 80, Issue 1; Other Information: DOI: 10.1103/PhysRevA.80.013806; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
Similar Records
Multimode theory of measurement-induced non-Gaussian operation on wideband squeezed light: Analytical formula
Multimode entanglement and telecloning in a noisy environment