Les activités de l'INTRIQ

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mai 11, 2017

When : Thursday, May 11th, 2017

Where : Pavillon Lassonde, Polytechnique Montréal

Organizer : Professor Sébastien Francoeur, Polytechnique Montréal

 

For registration, click HERE

mai 10, 2017

When : Wednesday, May 10th, 2017

Where : Pavillon Lassonde, Polytechnique Montréal

Organizers : Young INTRIQ researchers in collaboration with the INTRIQ Technological transfer & partnership committee

More information and registration on the event web site at IQID2017

nov. 25, 2016

CONFETI (CONFérence ÉTudiante de l'INTRIQ) is a yearly student conference sponsored by the INTRIQ. It attracts graduate students and post-docs in the fields of physics, mathematics, computer science and engineering working on quantum computing related projects.

Where and when
The conference will take place on January 10-12, 2017 at the Hôtel Château Bromont in Bromont, Québec.

Schedule 
Click here

Registration
Click here

 

 

Rencontres INTRIQ

mai 11, 2017
Posté par : Marc Leclair

Spring 2017 INTRIQ meeting


When : Thursday, May 11th, 2017

Where : Pavillon Lassonde, Polytechnique Montréal

Organizer : Professor Sébastien Francoeur, Polytechnique Montréal

 

For registration, click HERE

INTRIQ Meeting program

 8h30 -  9h00 : Registration

 9h00 -  9h10 : Opening remarks

 9h10 - 10h10 : Edo Waks, University of Maryland
                          Subject to be announced

10h10 - 10h40 : Coffee break

10h40 - 11h25 : Glen Evenbly, Université de Sherbrooke
                           Subject to be announced

11h25 - 12h10 : Denis Seletskiy, Polytechnique Montréal
                          Subject to be announced

12h10 - 14h00 : Lunch

14h00 - 14h45 : Stéphane Kéna-Cohen, Polytechnique Montréal
                           Quantum optics with light-matter particles

14h45 - 15h15 : Coffee break

15h15 - 16h00 : Yves Bérubé-Lauzière, Université de Sherbrooke
                           Superpositions of cavity Fock states with active measurement-based quantum feedback

16h00 -16h10 : Closing remarks

16h15 -           : Business meeting

INVITED SPEAKERS

Professor Edo Waks
University of Maryland
Subject to be announced

 

Professor Glen Evenbly
Université de Sherbrooke
Subject to be announced

 

Professor Denis Seletskiy
Polytechnique Montréal
Subject to be announced

 

Professor Stéphane Kéna-Cohen
Polytechnique Montréal
Quantum optics with light-matter particles
We will describe recent quantum optical experiments with hybrid light-matter particles called polaritons. In the first part of the talk, we will describe the fascinating physics of organic exciton-polaritons, quasiparticles that can form in optical microcavities. We will highlight how they can be used as low-threshold sources of coherent light and describe our recent experiments on polariton condensates, highlighting the spontaneous formation of quasi long-range order and the presence of nonlinear instabilities. Finally, we will show how the nonlinear properties of these quasiparticles allow for the first observation of room-temperature superfluidity. In the second part of the talk, we will describe traditional quantum optical experiments performed on-chip using nanoscale waveguides supporting surface plasmon-polaritons. In particular we will highlight how single quanta of surface plasmons can be generated and studied and finally we will show our results on the quantum interference of individual surface plasmon-polaritons‹a solid-state analog to the Hong-Ou-Mandel experiment.

 

Professor Yves Bérubé-Lauzière
Université de Sherbrooke
Superpositions of cavity Fock states with active measurement-based quantum feedback
The measurement-based quantum feedback scheme developed and implemented by Haroche and collaborators [Dotsenko et al., Phys. Rev. A 80, 013805 (2009) and Sayrin et al., Nature 477, 73-77 (2011)] to actively prepare and stabilize specific photon number states in cavity quantum electrodynamics (CQED) is a milestone achievement in actively protecting quantum states from decoherence. This feat was achieved by injecting, after each weak dispersive measurement of the cavity state via Rydberg atoms serving as cavity sensors, a low average number classical field (coherent state) to steer the cavity towards the targeted number state. This talk will present the generalization of the theory developed for targeting number states in order to prepare and stabilize desired superpositions of two cavity photon number states. A new distance measure will be introduced to quantify how close a quantum state superposition is to a targeted state and at the same time to more deeply discriminate different states. Results from realistic simulations taking into account decoherence and imperfections in a CQED set-up will be presented. These demonstrate the validity of the generalized theory and points to the experimental feasibility of preparing and stabilizing such superpositions. This is a further step towards the active protection of more complex quantum states than number states. This work, cast in the context of CQED, is also almost readily applicable to circuit QED.

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