تقرير
Joint Temporal Density Measurements for Two-Photon State Characterization
| العنوان: | Joint Temporal Density Measurements for Two-Photon State Characterization |
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| المؤلفون: | Kuzucu, Onur, Wong, Franco N. C., Kurimura, Sunao, Tovstonog, Sergey |
| سنة النشر: | 2008 |
| المجموعة: | Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics |
| الوصف: | We demonstrate a new technique for characterizing two-photon quantum states based on joint temporal correlation measurements using time resolved single photon detection by femtosecond upconversion. We measure for the first time the joint temporal density of a two-photon entangled state, showing clearly the time anti-correlation of the coincident-frequency entangled photon pair generated by ultrafast spontaneous parametric down-conversion under extended phase-matching conditions. The new technique enables us to manipulate the frequency entanglement by varying the down-conversion pump bandwidth to produce a nearly unentangled two-photon state that is expected to yield a heralded single-photon state with a purity of 0.88. The time-domain correlation technique complements existing frequency-domain measurement methods for a more complete characterization of photonic entanglement in quantum information processing. Comment: 4 pages, 5 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.101.153602 |
| URL الوصول: | http://arxiv.org/abs/0807.1573 |
| رقم الأكسشن: | edsarx.0807.1573 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.101.153602 |
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