High-Brightness Source of Narrowband, Identical-Photon Pairs
We generated narrowband pairs of nearly identical photons at a rate of 5 x 10⁴ pairs per second from a laser-cooled atomic ensemble inside an optical cavity. A two-photon interference experiment demonstrated that the photons could be made 90% indistinguishable, a key requirement for quantum informat...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2006-07, Vol.313 (5783), p.74-77 |
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| creator | Thompson, James K Simon, Jonathan Loh, Huanqian Vuletić, Vladan |
| description | We generated narrowband pairs of nearly identical photons at a rate of 5 x 10⁴ pairs per second from a laser-cooled atomic ensemble inside an optical cavity. A two-photon interference experiment demonstrated that the photons could be made 90% indistinguishable, a key requirement for quantum information-processing protocols. Used as a conditional single-photon source, the system operated near the fundamental limits on recovery efficiency (57%), Fourier transform-limited bandwidth, and pair-generation-rate-limited suppression of two-photon events (factor of 33 below the Poisson limit). Each photon had a spectral width of 1.1 megahertz, ideal for interacting with atomic ensembles that form the basis of proposed quantum memories and logic. |
| doi_str_mv | 10.1126/science.1127676 |
| format | Article |
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| subjects | Alloys Atoms Classical and quantum physics: mechanics and fields Coincidence Exact sciences and technology Fundamental areas of phenomenology (including applications) Information processing Liquid metals Liquids Musical chords Nonclassical field states squeezed, antibunched and sub-poissonian states operational definitions of the phase of the field phase measurements Optics Photons Physics Protons Quantum information Quantum optics Quantum theory Signal bandwidth Symmetry Voice leading |
| title | High-Brightness Source of Narrowband, Identical-Photon Pairs |
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