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|Author(s):||Jingyun Fan; M D. Eisaman; Alan L. Migdall;|
|Title:||Quantum state tomography of a fiber-based source of polarization-entangled photon pairs|
|Published:||December 20, 2007|
|Abstract:||We report an experimental demonstration of a bright highfidelity single-mode-optical-fiber source of polarization-entangled photon pairs. The source takes advantage of single-mode fiber optics, highly nonlinear microstructure fiber, judicious phase-matching, and the inherent stability provided by a Sagnac interferometer. With a modest average pump power (300 μW), we create all four Bell states with a detected two-photon coincidence rate of 7 kHz per bandwidth of 0.9 nm, in a spectral range of more than 20 nm. To characterize the purity of the states produced by this source, we use quantum-state tomography to reconstruct the corresponding density matrices, with fidelities of 95 % or more for each Bell state.|
|Pages:||pp. 18339 - 18344|
|Keywords:||accidental,bell state,coincidene,four-wave mixing,Raman scattering,Sagnac interferometer,tomography|
|Research Areas:||Entanglement, Quantum Optics, Quantum Information, Single Photon Detectors, Entangled Photons, Quantum Devices, Single Photon Sources, Squeezing, Correlated Photon Radiometry, Quantum Information Technology|
|PDF version:||Click here to retrieve PDF version of paper (358KB)|