Roberto Osellame from Politecnico di Milano is visiting us during the afternoon of Wed, March 23th.
He will deliver a seminar at 2:30 PM, Aula Polvani
Integrated quantum photonics in femtosecond-laser-written circuits
Quantum information concepts and ideas open new exciting perspectives in many applications, such as communications, computing, measurement science and sensing. Indeed, the unique properties of quantum mechanics can provide unprecedented security to cryptography, increase in sensitivity for sensing devices, exponential speed-up in computing and simulation of complex quantum systems. However, until recent years, severe limitations to the photonic realization of quantum experiments were imposed by the stability and size requirements of bulk optics. More recently, the exploitation of waveguide optics allowed robust operation and monolithic miniaturization, thus opening new perspectives for quantum experiments exploiting photonic qubits. Femtosecond laser micromachining is an ideal solution for the realization of such circuits in transparent dielectric media. Indeed, femtosecond laser pulses can be used as a “pen” to directly inscribe low-loss waveguides inside the substrate in three-dimensional geometry, thus allowing the fabrication of rather complex circuits integrated in a single chip. In this seminar I will review many examples of laser written circuits that enabled significant advances in quantum simulation, computing and cryptography.
Johannes Nokkala (University of Turku) will be visiting AQM from 14 to 18 March.
He will give a talk on Wednesday 16 March, 2 PM, at Auletta Ottica Quantistica (V piano LITA).
Johannes Nokkala (University of Turku)
Complex Quantum Networks as structured environments: engineering and probing
The first meeting of the EU consortium QuProCS will take place in Milan from 8 to 10 March 2016 at Sala Napoleonica, via S. Antonio 12, Milan. You can find the (draft) program here.
The venue is in the city centre and is a short walk from the Duomo (metro lines M1 and M3) and the Metro station Missori (line M3).
Some useful links:
Public city transport in Milan
From Malpensa Airport (MXP): Train to Milano Cadorna and then metro line M1 to Duomo or train, Bus1 or Bus2 to Milano Centrale and then M3 to Duomo.
From Linate Airport (LIN): Bus to Piazza San Babila (digit 73 to search the route).
From Bergamo Orio Al Serio Airport (BGY): Bus to Milano Centrale and then M3 to Duomo.
See the maps below for details. Milan local transport is also well documented on Google Maps (including timetables).
Map of conference site and directions for the venue (click on the image to enlarge):
Map of the conference site and some hotels
On February 17th, Wednesday, 12:00 AM in AQM room, (Department of Physics, LITA 5th floor).
Giacomo Tanzi Marlotti (Unimi PhD student) will deliver a seminar on a recent published research about quantum theoretical modeling of the properties of positronium atoms in small cavities. The title of the seminar is “A new insight on positronium confinement in nanoporous materials”.
On Wednesday 4 November, Paolo Bordone and Ilaria Siloi (University of Modena and Reggio Emilia) will be with us.
At 2PM AQM room @ LITA 5th floor Ilaria will deliver a talk entitled
Noisy two-particle quantum walks.
On Wed 28 October, 2PM AQM room @ LITA 5th floor Hossein Rangani (Urmia University, Iran) will deliver a talk entitled
Encoded information in the presence of random classical noises.
On Wednesday 21 October, 2PM AQM Room, Paolo Giorda (INRIM Torino) will be with us and deliver a talk entitled
Quantum effects in open systems dynamics and their roots in the Decoherent Histories Approach. An application to energy transfer processes in simple photosynthetic systems: the Quantum Recoil Avoiding effect and energy transfer efficiency.
On Wednesday 7 October, 2PM AQM room @ LITA 5th floor (together with a coffee), Jacopo Trapani and Giacomo Guarnieri (PhD student @ UNIMI) will deliver their 2-nd year seminars
2 PM Jacopo Trapani
Noisy quantum phase communication channels.
2:30 PM Giacomo Guarnieri
Energy backflow and non-Markovian dynamics
Matteo Rossi will deliver his summer-school seminar on Wednesday 30 September, at 2 PM at Auletta di Ottica Quantistica (5th floor LITA building), entitled “Quantum estimation from incomplete information”.
Antonio Mandarino, will deliver a talk on Wednesday, September 23th 2015, 2 PM at the Auletta di Ottica Quantistica (LITA 5th floor).
Fidelity in tomographic reconstruction of continuous variable systems
Abstract: Fidelity is a widely adopted measure of closeness between quantum states either pure or mixed. Although it is not a proper distance in the Hilbert space, fidelity can be linked to distances inducing a metric over the manifold of density matrix. This relation is commonly adopted to justify the assumption that states with a high value of fidelity, viz. 0.9 or 0.99 is enough to certify that two states shares identical physical properties. We analyze a set of experimentally generated quantum states by means of tomographic analysis. Hence we will show that benchmarking with the usual fidelity thresholds does not accomplish that task, in addition we emphasise how only full quantum tomography does.