Category Archives: Visiting

Alberto Porzio visiting AQM on April 26

Alberto Porzio from the SPIN institute of CNR (Napoli) will be visiting us on Wed 26 April, 2017.

Alberto will deliver a seminar at 12:30 room A5/S2, LITA Building

Encoding and Direct Detection of Continuous Variable Entanglement in the Orbital Angular Momentum Space

CV entangled beams carrying OAM are successfully generated by converting entangled polarization modes into vortex beams. Entanglement is detected by homodyning in the OAM space with the homodyne local oscillator switching between different OAM states.

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

Talk by Matteo Brunelli on Tue, Oct 25

Matteo Brunelli (Queen’s University Belfast) will be visiting us from 24 to 28 October 2016.

He will give a talk on Tuesday 25 October at 12 am in Aula Ottica Quantistica (A5/S2), 5th floor, LITA building, entitled:

Irreversibility and correlations in mesoscopic quantum systems: an optomechanical route

Abstract

In this talk I will present a theoretical framework to assess the degree of irreversibility of a dissipative process acting on an interacting quantum system. In particular, the entropy production rate of coupled quantum harmonic oscillators can be expressed in a simple form. I will apply the result to the analysis of the optomechanical interaction between a nano-mechanical resonator and a cavity field, and show the agreement between the predictions of our framework and experimental data.  In the second part, I will present a quantitative relation between the entropy production rate and the correlations, both total and quantum, built between the mechanical resonator and the cavity field.