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4 June 2010 Six-photon entangled Dicke state enabled by a UV enhancement cavity as novel SPDC photon source
Witlef Wieczorek, Roland Krischek, Akira Ozawa, Géza Tóth, Nikolai Kiesel, Patrick Michelberger, Thomas Udem, Harald Weinfurter
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Proceedings Volume 7727, Quantum Optics; 77270L (2010) https://doi.org/10.1117/12.853599
Event: SPIE Photonics Europe, 2010, Brussels, Belgium
Abstract
Photon sources for multi-photon entanglement experiments are commonly based on the process of spontaneous parametric down conversion. Due to the probabilistic photon production, such experiments suffer from low multiphoton count rates. To increase this count rate, we present a novel SPDC pump source based on a femtosecond UV enhancement cavity that increases the available pump power while maintaining a high repetition rate of 80MHz. We apply the cavity as photon source for realizing symmetric, multi-partite entangled Dicke states, which are observed with a high rate and high fidelity. We characterize the observed Dicke states of up to six photons using efficient tools exploiting the state's symmetries.
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Witlef Wieczorek, Roland Krischek, Akira Ozawa, Géza Tóth, Nikolai Kiesel, Patrick Michelberger, Thomas Udem, and Harald Weinfurter "Six-photon entangled Dicke state enabled by a UV enhancement cavity as novel SPDC photon source", Proc. SPIE 7727, Quantum Optics, 77270L (4 June 2010); https://doi.org/10.1117/12.853599
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KEYWORDS
Ultraviolet radiation
Mirrors
Quantum information
Crystals
Dispersion
Nonlinear crystals
Photon polarization
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