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Monday, March 18, 2019 1:15 pm - 1:15 pm EDT (GMT -04:00)

Ultrastrong and Cooperative Light-Matter Coupling

Junichiro Kono, Rice University

Recent experiments have demonstrated that light and matter can mix together to an extreme degree, and previously uncharted regimes of light-matter interactions are currently being explored in a variety of settings, where new phenomena emerge through the breakdown of the rotating wave approximation [1]. This talk will summarize a series of experiments we have performed in such regimes.

Thursday, February 28, 2019 1:30 pm - 1:30 pm EST (GMT -05:00)

"Quantum-assisted" magnetic resonance across length scales

Ashok Ajoy, University of California, Berkeley

The development of atom-like quantum sensors in wide bandgap materials, for instance Nitrogen Vacancy (NV) centers in diamond, has thrown up exciting new possibilities for the sensing of materials, molecules and biological systems through optical means. In particular I will describe the development of “quantum-assisted” magnetic resonance probes based on the NV center that allows sensing of nano- and meso-scale volumes at high spatial and frequency resolution [1,2].

Monday, February 25, 2019 1:30 pm - 1:30 pm EST (GMT -05:00)

Continuing on Parallel Repetition

Arthur Mehta, IQC / Department of Pure Mathematics

In this talk we continue our discussion of parallel repetition for non-local games. We will begin with a brief recap of the previous talk and the famous counterexample due to Feige. We then take a  look at a game that has interesting outcomes in the context of the quantum tensor product model. We will conclude by reviewing some of the major results on this topic for a variety of correlation sets.

Friday, February 22, 2019 10:30 am - 10:30 am EST (GMT -05:00)

Exploring Synthetic Quantum Matter in Superconducting Circuits

Alex Ruichao Ma, University of Chicago

Superconducting circuits have emerged as a competitive platform for quantum computation, satisfying the challenges of controllability, long coherence and strong interactions. Here we apply this toolbox to the exploration of strongly correlated quantum materials made of microwave photons. We develop a versatile recipe that uses engineered dissipation to stabilize many-body phases, protecting them against intrinsic photon losses.

Monday, February 25, 2019 2:30 pm - 2:30 pm EST (GMT -05:00)

Battling in the realm of a topological superconductor candidate: Sr2RuO4

Wen Huang, Shenzhen Peng Cheng Laboratory

Since its discovery in 1994, the unconventional superconductivity in Sr2RuO4 has attracted tremendous interest. The prospect of it being a topological chiral p-wave superconductor, which supports Majorana fermions, makes it a potential solid state platform for topological quantum computation. However, despite the multiple signatures in support of chiral p-wave pairing, a number of key measurements in the last decade have called into question this interpretation.

Tuesday, February 26, 2019 1:30 pm - 1:30 pm EST (GMT -05:00)

Ultracold Molecules: From Quantum Chemistry to Quantum Computing

Alan Jamison, Massachusetts Institute of Technology (MIT)

Cooling atomic gases to quantum degeneracy opened the new field of quantum simulation. Here the precise tools of atomic physics can be used to study exotic models from condensed matter or nuclear physics with unique tunability and control. Ultracold molecules bring many new possibilities to quantum simulation. I will review the physics of ultracold molecules, including our recent production of stable, ultracold triplet molecules and what they can add to quantum simulation.

Wednesday, February 13, 2019 1:30 pm - 1:30 pm EST (GMT -05:00)

Microwave quantum devices based on Josephson photonics

Max Hofheinz, University of Sherbrooke

In superconducting quantum circuits the Josephson junction is the key element because it is the only strongly nonlinear and dissipationless circuit element we know. Usually it is used in the superconducting state where it acts as a nonlinear inductor, for example in Josephson qubits or Josephson parametric amplifiers. But a Josephson junction can also be nonlinear and dissipationless when a non-zero DC voltage below the gap is applied.

Friday, February 8, 2019 1:30 pm - 1:30 pm EST (GMT -05:00)

Parallel repetition for non-local games

Arthur Mehta, IQC

Non-local games, also known as interactive proof systems, have long been an important area of study for mathematicians, physicists and computer scientists. Starting with the famous CHSH game in 1969, it has been known that non-local games are also an ideal area to explore the differences between quantum and classical behaviour. This has motivated the study of the area of non-local games for people working in quantum information.

Monday, February 11, 2019 2:30 pm - 2:30 pm EST (GMT -05:00)

Heat bath algorithmic cooling with thermal operations

Alvaro Alhambra, Perimeter Institute

Heat-Bath Algorithmic Cooling is a technique for producing pure quantum systems by utilizing a surrounding heat-bath. Here we connect the study of these cooling techniques to the resource theory of athermality, enabling us to derive provably optimal cooling protocols under a variety of experimental restrictions on the available control.