Category Archives: Seminars

Elsi-Mari Laine and Massimo Borrelli visiting AQM

Elsi-Mari Laine and Massimo Borrelli from the University of Turku (Finland) will visit us from Monday 13 to Friday 17 July.

They will deliver two talks on Wednesday 15 July.

Room: Aula di Ottica Quantistica (5th floor LITA building)

17:00: Elsi-Mari Laine (University of Turku)

“Dynamics of incompatibility of quantum measurements in open systems”

The non-classical nature of quantum states, whether depicted with entanglement or quantum discord, is often considered as resource for quantum information protocols. However, the non-classicality of a quantum system cannot be encapsulated as a property of the state alone, as the set of available measurements used to extract information on the system may also be restricted. In this work we study how the non-classicality of quantum measurements, quantified via their incompatibility, is influenced by quantum noise and, further, how a non-Markovian environment may help us in maintaining the measurement resources.

17:30: Massimo Borrelli (University of Turku)

“Quantum probing of complex systems”

Quantum probes are controllable quantum objects that can be used to investigate complex systems via tailored, engineered interactions. By monitoring the dynamics of the probe(s) one can directly access some of the complex system’s features, such as average quantities and correlations. In this talk we are going to give a brief introduction to quantum probes, with particular emphasis on the open-system approach. Furthermore, we are going to discuss a few examples of successful applications of quantum probing to many-body systems.

Talk by Gianluca Oppo on May 12, 2015

We are glad to announce a talk by Gianluca Oppo (University of Strathclyde) which will take place on May 12, at 15:00, in Sala Polvani. Here in the following the title and abstract:

Opto-mecahnics of cold atoms and Bose-Einstein Condensates

Gianluca Oppo, University of Strathclyde

We consider theoretically and experimentally the behaviour of cold or ultra-cold atoms interacting with a laser beam in an optical cavity or in a single-feedback mirror set-up. The optical nonlinearity is augmented by the presence of the dipole force where atoms tend to move towards minima or maxima of the light intensity depending on the the difference between their resonant frequency and the frequency of the laser light (opto-mechanics). We observe novel Turing patterns entirely due to opto-mechanic effects in a cloud of cold Rubidium atoms under the action of an input laser beam and a feedback mirror. The role of the (cold) temperature is essential in these experimental measures. We then generalise these spatial features to the case of cold atoms in a cavity where dissipative solitons appear in the atomic density as well as in the light intensity distribution.

When considering ultra-cold atomic gases (Bose-Einstein condensates) new quantum features appear in the form of a threshold for pattern formation in the atomic density driven by the Heisenberg
indetermination principle. We also show that conservative chaos occurs in spite of the presence of the external driving and energy dissipation from the cavity mirrors.

Quantum EXPO workshop on Feb 24

The next Quantum Expo workshop, on the topic Quantum Information and Controlwill be held on Wednesday, February 24, 2015 at the Physics Department of the University of Milan (Aula Polvani) at 11:00. Here is the program of the workshop:

11:00 Stefano Mancini (Università di Camerino)

Entanglement assisted feedback control

11:50 Young scientist seminar
Michele Avalle

Transport process and typicality of noisy quantum systems with discrete time

14:30 Marco G. Genoni (University College London)

Cooling and squeezing generation for a levitated nanosphere via time-continuous measurements


Download the poster with program and abstracts!


Quantum Expo

We are happy to launch a series of one-day workshops on Quantum Technology (Quantum Expo) where junior and senior scientists may interact on specific advanced topics at the edge of current research. Each workshop is devoted to a specific (hot!) topic in quantum technology and involves two complementary (or even contradictory) talks delivered by internationally recognized scientists. Each workshop also include one or two short talks delivered by junior scientists (not only from Milan Universities, submissions encouraged: contact us!)