Les activités de l'INTRIQ

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mai 13, 2020

When : Wednesday, May 13th, 2020

Where : Polytechnique Montréal

Organizers :
     Pr Denis Seletskiy, Polytechnique Montréal
     Pr Louis Salvail, Université de Montréal

mai 12, 2020

When : Tuesday, May 12th, 2020

Where : Polytechnique Montréal

Organizers : INTRIQ student committee

The event gives the opportunity for the INTRIQ community to collaborate and network with invited young researchers recently hired by private companies with activities in quantum information processing.

nov. 11, 2019

At Hotel Château Bromont

Organizers :
     Éva Dupont Ferrier, Université de Sherbrooke
     Dave Touchette, Université de Sherbrooke

90, rue Stanstead, Bromont QC J2L 1K6
Téléphone : 1 800 304 3433

Note : The INTRIQ Business meeting (reserved for members) will be held in room "Salle des cantons" on November 11th from 9h30 to 10h30

Meeting program

November 11th

10h30 - 10h55  Registration

10h55 - 11h00  Opening remarks (Salon A)

11h00 - 11h45  Pr Frédéric Dupuis, Université de Montréal
                         Purely quantum polar codes 

11h45 - 12h05  Marco David, Student, McGill University
                         QED. The Quest to Formally Verify Mathematics

12h05 - 13h30  Lunch  (Dining room - 4 Canards)

13h30 - 14h15  Dr Louis Gaudreau, National Research Council (NRC) - Ottawa
                         Entanglement distribution via coherent photon-to-spin conversion in semiconductor quantum dot circuits

14h15 - 14h45  Dr Joel Griesmar, Université de Sherbrooke
                         A mesoscopic spectrometer based on the Josephson effect

14h45 - 15h15  Coffee break  (Salon B)

15h15 - 15h45  Dr Stephane Virally, Polytechnique Montréal
                          Quantum optics in the time domain 

15h45 - 16h25  Industry & Startups in quantum technologies
                              Dr Félix Beaudoin, Les Technologies Nanoacademic Inc (www.nanoacademic.com)
                              Dr David  Roy-Guay, SB Quantum (www.sbquantum.com)
                              Pr David Poulin, Microsoft (0pen positions at Microsoft)

16h25 - 17h00  Equity, diversity & inclusion (minutes and photos of the workshop)

17h00 -             Poster session with refreshments (Salon B)

19h30 -             INTRIQ dinner (Knowlton room)


November 12th

  8h30 -  9h00  Pr Anne Broadbent, Université d'Ottawa
                          Quantum encryption with certified deletion

 9h00 - 10h00  Dr Tomas Jochym-O'Connor, IBM - Yorktown Heights, New York
                        Disjointness in stabilizer codes

10h00 - 10h30  Coffee break (Salon B)

10h30 - 11h30 Pr Signe Seidelin, Institut NEEL CNRS/UGA
                        Rare-Earth Doped Crystals for strain-coupled optomechanics

11h30 - 12h00  Dr Erika Janitz, McGill University
                         Cavity-Enhanced Photon Emission from a Single Germanium-Vacancy Center in a Diamond Membrane

12h00 - 13h30  Lunch  (Dining room - 4 Canards)

13h30 - 14h00  Pr Jérôme Bourassa, Cégep de Granby
                         Quantum illumination : exploiting quantum correlations when entanglement is lost

14h00 - 14h30  Dr Thomas Baker, Université de Sherbrooke
                          Modeling superconducting circuits with a tensor network

14h30 - 15h00  Dr Anirban Chowdhury, Université de Sherbrooke
                          Simulating thermal physics on quantum computers

15h00 - 15h30  Questions and answers

15h30 - 15h40  Closing remarks


Axe 2 - Hardware

(- Cette section est en anglais pour permettre aux specialistes non-fracophones de la lire -)

From the first vacuum-tube-based digital devices to massively parallel supercomputers, classical information-processing hardware has both spurred and been driven by increasingly sophisticated software. For example, Graphics Processing Units (GPUs) were developed for graphical applications such as video games. Future quantum hardware must also evolve in close communication with its software counterpart. Moreover, just as conventional computing infrastructure combines magnetic memory with electronic circuits and fibre-optic relays, a quantum processor may require combining physical platforms with complementary characteristics: for example, superconducting qubits for fast processing, nuclear spins for long-term storage, and photons to carry information. Within INTRIQ, our members are pursuing a wide variety of physical systems. The diversity of expertise encourages collaborations linking different hardware platforms, and stimulates dialogue for application-driven device development.

Theme 2.1 - Electric charge
Transport and confinement of quantized electric charges presents a natural resource for quantum information science. Electrons flowing through a tunnel junction exhibit shot noise that enables generation of nonclassical electromagnetic signals: squeezing, photon pair generation, and even entanglement have all been experimentally demonstrated. Conversely, by confining electrons to quantum dots, their motional degrees of freedom are quantized, and it becomes possible to address individual electronic states. Such control over the electronic charge is closely interrelated with access to the electronic spin, while the charge itself couples strongly to optical and microwave photons.

Theme 2.2 - Spin
Isolated electronic or nuclear spins are among the most coherent systems, exhibiting quantum evolution on timescales that can stretch to seconds, minutes, or even hours. Fully exploiting that coherence requires developing methods to control spin states on fast timescales and, critically, learning to connect individual spin qubits into an interacting quantum processor. While direct spin-spin interactions present one scaling mechanism, a more versatile approach is to couple the spin to other, more mobile quantum degrees of freedom, such as optical or microwave photons or even phonons, that can mediate interactions with other spins or other qubits. Different types of spins and different confining mechanisms – such as quantum dots or crystal defects – offer complementary features, readily interacting with electric, magnetic, or even strain fields. In addition, coherent control over spin qubits can be exploited for near-term quantum technologies such as precision sensors.

Theme 2.3 - Composite and exotic electronic states
Superconducting qubits have risen to the forefront of quantum information processing platforms because their paired electronic states can be largely protected from noise by the superconducting gap, yet interact strongly with electromagnetic fields. Still more complex electronic states can give rise to anyons, exotic particles that naturally encode information in an inherently robust way. While cell phone communication requires error correction to protect the transmission from noise, the processor on a laptop does not: it is built from physical devices that are intrinsically robust. Similarly, anyons could feasibly store and process quantum information in an inherently robust way. Several candidates have been identified to fulfill this role: excitations in fractional quantum Hall fluids, edges excitations in nanowires, etc. While this research path is currently behind the other potential realizations of quantum devices, it could completely change the game for qubit technologies.

Theme 2.4 - Photons and phonons
An optical photon is a natural "flying qubit," capable of carrying quantum states encoded in its polarization, frequency, or timing through free space or over fibre-optic links. It is the natural medium for quantum communication, and development and construction of high-quality single photon sources is essential for many secure quantum cryptography protocols. Furthermore, by confining a photon to a resonator, it can live for long enough to interact strongly with any quantum system coupled to the cavity, for example a single spin. The same principles apply (with even greater enhancement) in the microwave regime, where INTRIQ researchers study superconducting elements coupled to microwave stripline resonators. Similarly, nanomechanical resonators enhance interactions between phonons and a variety of physical systems. Such resonator-based systems can be used to controllably create, manipulate, and transfer quantum states, even between qualitatively different quantum systems.

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