Journal
PHYSICAL REVIEW A
Volume 79, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.063846
Keywords
light coherence; optical correlation; optical frequency conversion; optical pumping; quantum cryptography; quantum entanglement; quantum optics; statistical analysis
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Funding
- Austrian FWF [SFB15, TRP-L135]
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Direct measurement of photon bunching (g((2)) correlation function) in one output arm of a spontaneous-parametric-down-conversion source operated with a continuous pump laser in the single-photon regime is demonstrated. The result is in agreement with the statistics of a thermal field of the same coherence length and shows the feasibility of investigating photon statistics with compact continuous-wave-pumped sources. Implications for entanglement-based quantum cryptography are discussed.
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