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Alfred B. U'Ren
Researcher at National Autonomous University of Mexico
Publications - 143
Citations - 3783
Alfred B. U'Ren is an academic researcher from National Autonomous University of Mexico. The author has contributed to research in topics: Photon & Spontaneous parametric down-conversion. The author has an hindex of 27, co-authored 133 publications receiving 3276 citations. Previous affiliations of Alfred B. U'Ren include Ensenada Center for Scientific Research and Higher Education & University of Oxford.
Papers
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Journal ArticleDOI
Heralded generation of ultrafast single photons in pure quantum states
Peter J. Mosley,Jeff S. Lundeen,Brian J. Smith,Piotr Wasylczyk,Piotr Wasylczyk,Alfred B. U'Ren,Christine Silberhorn,Ian A. Walmsley +7 more
TL;DR: It is shown that, through controlling the modal structure of the photon pair emission, one can generate pairs in factorable states and thence eliminate the need for spectral filters in multiple-source interference schemes.
Journal ArticleDOI
Eliminating frequency and space-time correlations in multiphoton states
TL;DR: In this article, it was shown that the frequency and space-time correlations of photon pairs generated in the process of spontaneous parametric downconversion possess undesired distinguishing information and that these correlations may be eliminated if certain conditions in the source configuration are satisfied.
Journal ArticleDOI
Photon pair-state preparation with tailored spectral properties by spontaneous four-wave mixing in photonic-crystal fiber
Karina Garay-Palmett,H. J. McGuinness,Offir Cohen,Jeff S. Lundeen,Raúl Rangel-Rojo,Alfred B. U'Ren,Michael G. Raymer,Colin J. McKinstrie,Stojan Radic,Ian A. Walmsley +9 more
TL;DR: It is shown that it is possible to engineer two-photon states with specific spectral correlation ("entanglement") properties suitable for quantum information processing applications, and which allows heralding of single-Photon pure-state wave packets without the need for spectral post filtering.
Journal ArticleDOI
Efficient conditional preparation of high-fidelity single photon states for fiber-optic quantum networks.
TL;DR: A parametric down-conversion source exhibiting a conditional detection efficiency of 51% (with corresponding preparation efficiency of 85%) and extraordinarily high detection rates of up to 8.5 x 10(5) coincidences/(s mW) is demonstrated.
Journal Article
Generation of pure-state single-photon wavepackets by conditional preparation based on spontaneous parametric downconversion
Alfred B. U'Ren,Christine Silberhorn,Reinhard Erdmann,Konrad Banaszek,Warren P. Grice,Ian A. Walmsley,Michael G. Raymer +6 more
TL;DR: In this paper, the conditional preparation of single photons based on parametric downconversion was studied, where the detection of one photon from a given pair heralds the existence of a single photon in the conjugate mode.