All posts by admin

Congrats to Jacopo and Zeudi!

On January 19th, 2016 our PhD students Jacopo Trapani and Zeudi Mazzotta defended their theses and obtained their PhD degree from the University of Milan.

Jacopo’s thesis is on Stochastic noise approach to non-Markovian decoherence in continuous variable open quantum systems, while Zeudi’s is on Positronium laser excitation in the AEgIS experiment.

We congratulate with Jacopo and Zeudi for their important achievement and we wish them all the best for their future. Well done guys!!

Tommaso Tufarelli visiting AQM

Tommaso Tufarelli, from University of Nottingham, is visiting AQM from Tuesday 10 to Thursday 12 January.

He will deliver a talk on Wednesday, 11 January at 12:30 in Auletta Ottica Quantistica (5 piano LITA)

Refining the Dicke Model

I will start by reviewing an interesting signature of the “A^2 term” in a simple Dicke model featuring two coupled oscillators [first reported in Phys. Rev. A 91, 063840 (2015)]. Then, I will discuss conditions under which such model could be derived as an approximation to a minimal coupling Hamiltonian in Coulomb-gauge, showing that some additional Hamiltonian terms, not usually discussed in the literature, should be present in the ultrastrong coupling regime.

Andrea Smirne visiting

Andrea Smirne, from Ulm University, will be visiting the Physics Department from Monday, 12 December. He will give a lecture and a talk about quantum parameter estimation.

Monday 12 December, 8.45,  Aula I

Lecture Classical and quantum limits to the achievable precision in parameter estimation

Wednesday 14 December, 13.30, Aula Bonetti

Seminar Overcoming the classical limits for frequency estimation in the presence of a general class of open-system dynamics

Continue reading Andrea Smirne visiting

The Big Bell Test

screen-shot-2016-11-15-at-17-13-33

The BIG Bell Test (BBT) is a worldwide project to bring human unpredictability (randomness) to cutting-edge physics experiments. It may be surprising, but there are aspects of physical reality that can only be understood by asking unpredictable questions of nature. The most famous experiment of this kind is the Bell test. In the BBT, laboratories around the world (see map) will prepare entangled quantum particles: electrons, photons, atoms, and superconductors. Through the Internet, an army of participants, the Bellsters, will shower these particles with unpredictable, high-speed “questions” (measurements, in fact). Together, we will perform unique quantum physics experiments, including the first human-driven Bell test.

The experiments will all take place on Wednesday, November 30th and everyone can contribute by going to the project website and playing the games proposed.

Claudia Benedetti, Marco Genoni and Stefano Olivares from the Applied Quantum Mechanics Group will give an introductory seminar aimed at high-school and university students on Tuesday, November 29th at 14:30 in Aula A of the Physics Department.

Here are the slides of the seminar:
Intro di meccanica quantistica (Olivares)
BIG Bell Test (Benedetti, Genoni)

A blog article on the experiment by Matteo Rossi:
https://www.tomshw.it/big-bell-test-la-meccanica-quantistica-ha-bisogno-di-voi-81653

Further material is available on the ICFO website:
http://outreach.icfo.eu/media/upload//arxius/BBT/quantum_eng.pdf

Planck. La rivoluzione quantistica, in edicola con il Corriere

 planck_front  planck_back

Da oggi, 16 novembre, è disponibile in edicola con il Corriere della Sera e la Gazzetta dello Sport la terza monografia della collana Grandangolo Scienza, intitolata Planck. La rivoluzione quantistica.

Il libro, a cura di Stefano Olivares, dell’Applied Quantum Mechanics Group, e Lanfranco Belloni,  affronta la vita scientifica del fisico tedesco Max Planck, che nel 1900 diede inizio alla rivoluzione della meccanica quantistica formulando l’ipotesi che gli scambi di energia tra radiazione e materia avvenissero in forma discreta e non continua. Per questo contributo fondamentale allo sviluppo della fisica moderna fu insignito del premio Nobel nel 1918 e il suo nome è accostato a una delle costanti fondamentali della fisica.

Monografia su Fermi a cura di Stefano Olivares con il Corriere

Fermi Fermi_back

Stefano Olivares, dell’Applied Quantum Mechanics Group, è curatore, con Lanfranco Belloni,  della monografia Fermi. L’energia atomica, secondo volume della collana Grandangolo Scienza, in edicola da mercoledì 8 novembre con il Corriere della Sera e la Gazzetta dello Sport.

Il libro ricostruisce il percorso che portò il brillante scienziato alla conquista del premio Nobel per la Fisica, nel 1938, con acquisizioni di portata sensazionale: l’equazione della statistica delle particelle Fermi-Dirac; la formulazione della teoria del decadimento beta e l’introduzione di una terza forza in natura (oltre alla gravità e alla forza elettromagnetica), la cosiddetta interazione debole, che si manifesta a livello nucleare; la scoperta della possibilità di ottenere reazioni nucleari utilizzando i neutroni lenti. Poi venne il trasferimento di Fermi in America, dove progettò e costruì la prima pila atomica.

Segnaliamo inoltre la prossima uscita della collana, Planck. La rivoluzione quantistica, anch’essa a cura di Stefano e Lanfranco, disponibile in edicola da mercoledì 16 novembre.

Thanks Rodolfo

rodolfobonifacio2-42-41-1-11-16

Rodolfo Bonifacio has died aged 76 on November 1st, 2016.

Rodolfo graduated in 1964 at the University of Milan, where he became full professor in 1981.

Rodolfo is well known in quantum optics for having developed the theory of optical bistability together with Luigi Lugiato and, together with Tito Arecchi, the so-called Maxwell-Bloch equations for the evolution of a two-level atom in an optical resonator.

Rodolfo and Giuliano Preparata also studied the spontaneous emission from a collection of two-level systems interacting with the quantised electromagnetic field, showing for the first time the coherence of the emitted radiation.

Rodolfo received the Michelson Medal in 1987 and the Einstein Medal in 1994. He taught quantum mechanics to many generations of students, trying to be (using his own words) “vigorous” rather than “rigourous” and putting an emphasis on the applicative aspects of the theory.

He was instrumental to the development of the Applied Quantum Mechanics group at the beginning of the century, tenaciously insisting to have new positions for the emerging field of quantum information processing.

Thanks Rodolfo, R. I. P.