Events

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.

QUANTUM + Film: A screening of 10 Quantum Shorts

A festival for quantum-inspired films

The Quantum Shorts festival called for short films inspired by quantum physics and the universe answered. Filmmakers all over the world responded with their movies.

Multi-level control in large-anharmonicity high-coherence capacitively shunted flux qubits

PhD Candidate: Muhammet Yurtalan
Supervisors: Adrian Lupascu and Zbigniew Wasilewski

Thesis on display in the Engineering graduate office, E7-7402.

Oral defence in EIT 3142.

Fereshte Ghahari Kermani, National Institute of Standards and Technology (NIST)

Recent progress in creating graphene quantum dots (QDs) with fixed build-in potentials has offered a new platform to visualize and probe the confined electronic states. In this talk, I describe scanning tunneling spectroscopy measurements of the energy spectrum of graphene QDs as a function of energy, spatial position, and magnetic field.

Shun Yanai, Delft University of Technology

Microwave optomechanical circuits have been demonstrated in the past years to be powerful tools for both, exploring fundamental physics of macroscopic and massive quantum objects as well as being promising candidates for novel on-chip quantum limited microwave devices. In this work, we explore a microwave optomechanical device consisting of a coplanar microwave cavity coupled to a mechanical high quality factor nanobeam resonator.

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.

APS March Meeting Student Practice Talk Session

Silicon MOSFET quantum dots with simplified metal-gate geometry

Eduardo Barrera

Silicon (Si) CMOS spin qubits have become a promising platform for a future quantum information processor due to recent demonstrations of high fidelity single and two qubit gates [Veldhorst et. al., Nature 526.7573 (2015)], compatibility with industrial CMOS process and promising prospects for scalability.

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.

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.

Arnaud Carignan-Dugas, IQC / Department of Applied Mathematics

Inevitably, assessing the overall performance of a quantum computer must rely on characterizing some of its elementary constituents and, from this information, formulate a broader statement concerning more complex constructions thereof. However, given the vastitude of possible quantum errors as well as their coherent nature, accurately inferring the quality of composite operations is generally difficult.