245 citations · 661 across the 6 of their papers we have counts for
6 papers
Entanglement-enhanced probing of a delicate material system
Florian Wolfgramm, Chiara Vitelli, Federica A. Beduini +2
Quantum metrology uses entanglement and other quantum effects to improve the sensitivity of demanding measurements. Probing of delicate systems demands high sensitivity from limite…
Atom-Resonant Heralded Single Photons by Interaction-Free Measurement
Florian Wolfgramm, Yannick A. de Icaza Astiz, Federica A. Beduini +2
We demonstrate the generation of rubidium-resonant heralded single photons for quantum memories. Photon pairs are created by cavity-enhanced down-conversion and narrowed in bandwid…
Squeezed-Light Optical Magnetometry
Florian Wolfgramm, Alessandro Cere, Federica A. Beduini +3
We demonstrate a light-shot-noise-limited magnetometer based on the Faraday effect in a hot unpolarized ensemble of rubidium atoms. By using off-resonant, polarization-squeezed pro…
NOON states from cavity-enhanced down-conversion: High quality and super-resolution
Florian Wolfgramm, Alessandro Cere, Morgan W. Mitchell
Indistinguishable photons play a key role in quantum optical information technologies. We characterize the output of an ultra-bright photon-pair source using multi-particle tomogra…
Narrowband tunable filter based on velocity-selective optical pumping in an atomic vapor
Alessandro Cere, Valentina Parigi, Marta Abad +3
We demonstrate a tunable, narrow-band filter based on optical-pumping-induced circular dichroism in rubidium vapor. The filter achieves a peak transmission of 14.6%, a linewidth of…
Bright filter-free source of indistinguishable photon pairs
F. Wolfgramm, X. Xing, A. Cerè +3
We demonstrate a high-brightness source of pairs of indistinguishable photons based on a type-II phase-matched doubly-resonant optical parametric oscillator operated far below thre…