We are glad to announce that Stefano Pirandola (University of York) will deliver a talk on Tuesday 14 July at the Aula di Ottica Quantistica (5th floor LITA building). An abstract of the talk follows.
Stefano Pirandola (University of York)
Relay-based protocols in correlated-noise Gaussian environments
We consider continuous-variable protocols exploiting a quantum relay, such as entanglement swapping, quantum teleportation, and QKD. Their theory is extended to a non-Markovian spatial model of decoherence characterized by correlated Gaussian noise. Even if bipartite entanglement is completely lost at the relay, we show that the various protocols can progressively be reactivated by the separable noise-correlations of the environment.
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.
Matteo Bina will join us starting from June 2015 as UniMI research fellow on a project about Quantum Technology. Congrats to Matteo and welcome on board!
Claudia Benedetti will join us starting from June 2015 as post-doc within the EU Proactive project QuProCs – “Quantum Probes for Complex Systems”.
Congrats to Claudia and Welcome on board!
Modena, 23 – 25 June 2015
A focused workshop devoted to the synthesis and the characterization of quantum states, measurements and operations for the development of novel quantum technologies in open quantum systems will take place in Modena from 23 to 25 June 2015.
The workshop will represent the kick-off meeting for the newly established Quantum Technology Lab (QTL) of UniMI, a novel research center aimed at developing new solutions to problems in fundamental and applied science by using new tools based on quantum physics and quantum technologies and by building-up core competences for the wider exploitation of quantum science and technologies in mainstream engineering.
The workshop is organized by M. G. A. Paris thanks to the support of EU through the Collaborative Projects QuProCS (Grant Agreement 641277) and UniMI through the H2020 Transition Grant 14-6-3008000-625.
Program of the workshop (PDF)
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.
A conference devoted to Non Markovian quantum dynamics will take place from 24 to 28 August 2015 organized by S. Maniscalco, J. Piilo, V. Giovannetti and M. G. A. Paris.
The idea is to put together a limited number of theoreticians in a special environment to foster discussions and collaborations. The workshop is by invitation only and the number of participants will be about 50.
The workshop will take place at the Palazzone, a monumental villa owned by Scuola Normale and located in Cortona, Italy.
The workshop has been made possible by the support of Centro di ricerca matematica E. De Giorgi with contributions from Scuola Normale Superiore, University of Turku and University of Milan.
The conference webpage is users.unimi.it/cortona15.
The next Quantum Expo workshop, on the topic Quantum Information and Control, will 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
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!
On January 30th, 2015, Claudia Benedetti defended her thesis Decoherence, non-Markovianity and quantum estimation in qubit systems subject to classical noise and thus obtained her PhD degree from the University of Milan.
We all congratulate with Claudia for this important achievement in her research career and we wish her all the best for the future. Well done Claudia!!!
The next Quantum Expo workshop, on the topic Quantum estimation with classical and nonclassical states, will be held on February 18, 2015 at the Physics Department of the University of Milan (Aula Polvani) at 11:00. The workshop will feature talks by Gerardo Adesso (University of Nottingham) and Daniel Braun (Universität Tübingen).
Download the poster with program and abstracts!