Post-processing with linear optics for improving the quality of single-photon sources
arXiv:quant-ph/0402018 · doi:10.1088/1367-2630/6/1/093
Abstract
Triggered single-photon sources produce the vacuum state with non-negligible probability, but produce a much smaller multiphoton component. It is therefore reasonable to approximate the output of these photon sources as a mixture of the vacuum and single-photon states. We show that it is impossible to increase the probability for a single photon using linear optics and photodetection on fewer than four modes. This impossibility is due to the incoherence of the inputs; if the inputs were pure-state superpositions, it would be possible to obtain a perfect single-photon output. In the more general case, a chain of beam splitters can be used to increase the probability for a single photon, but at the expense of adding an additional multiphoton component. This improvement is robust against detector inefficiencies, but is degraded by dark counts or multiphoton components in the input.
17 pages, 5 figures
References in corpus (11)
- Security Aspects of Practical Quantum Cryptography
- Quantum Cryptography with Entangled Photons
- Triggered single photons from a quantum dot
- Deterministic Single-Photon Source for Distributed Quantum Networking
- Photon antibunching in the fluorescence of individual color centers in diamond
- On the impossibility of distilling Gaussian states with Gaussian operations
- Linear Optical CNOT Gate in the Coincidence Basis
- Enhanced single-photon emission from a quantum dot in a micropost microcavity
- Measurement-induced Nonlinearity in Linear Optics
- Efficient Classical Simulation of Optical Quantum Circuits
- On improving single photon sources via linear optics and photodetection
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