Marco Bellini
Author's posts
May 01 2011
Random-sampling XUV Ramsey spectroscopy
We demonstrate a new scheme for performing Ramsey-type spectroscopy of XUV atomic transitions with high-order harmonics. Random time-sampling intervals are used to achieve absolute XUV frequency measurements at high accuracy and resolution.
Jan 01 2011
A hi-fi noiseless amplifier for quantum light states
We have demonstrated the operation of a non-deterministic noiseless amplifier based on the addition and subtraction of single photons. Our scheme greatly outperforms all other existing approaches to phase-insensitive noiseless amplification, both in terms of amplification gain and final state fidelity.
Mar 18 2010
High-resolution Ramsey XUV spectroscopy on bound atomic states
We demonstrate the potential of a Ramsey spectroscopic scheme based on high-order harmonics to reach a resolving power >10^5 in the XUV. This is done by measuring clear quantum interferences in the excitation of an Argon transition at 87 nm for XUV pulse delays larger than 100 ps.
Mar 01 2010
Best Poster Prize at the “Quantum Communication based on Integrated Optics” Heraeus Seminar
Our PhD student Constantina Polycarpou wins the Best Poster Prize at the “Quantum Communication based on Integrated Optics” Heraeus Seminar
Dec 31 2009
OSA “Best of 2009” in Optics and Photonics News
Our works on single-photon manipulation of quantum light states have been chosen among the OSA “Best of 2009” in Optics and Photonics News
Oct 18 2009
First direct test of quantum commutation rules
Arbitrary superpositions of quantum operators demonstrated: first direct quantitative test of quantum commutation rules. We designed a scheme for conditionally generating arbitrary coherent superpositions of quantum operators. The general scheme was later applied to an experiment for implementing the commutator of the creation and annihilation operators. We quantitatively verified the well-known commutation rules in a …
Jan 18 2009
“The nature of light: What is a photon?”
Dec 31 2008
“Best of 2008” in New Journal of Physics
Dec 18 2008
Playing with photon subtraction
We implemented a reliable scheme for single photon subtraction and tested its effects on paradigmatic light states: Fock, thermal, and coherent. When applied to coherent states, the annihilation operator does not modify the state itself. Experimentally verified that coherent states are eigenstates of the photon annihilation operator.
Sep 23 2008
Cavity-enhanced generation of highly-nonclassical states
We use a pulsed pump enhancement cavity to produce highly-nonclassical states of light at high repetition rates. The frequency comb structure of the pump laser may be transferred to the produced quantum light.
