Events

Ke He, Tsinghua University

The quantum anomalous Hall (QAH) effect is a quantum Hall effect induced by spontaneous magnetization instead of an external magnetic field. The effect occurs in two-dimensional (2D) insulators with topologically nontrivial electronic band structure which is characterized by a non-zero Chern number. The experimental observation of the QAH effect in thin films of magnetically doped (Bi,Sb)2Te3 topological insulators (TIs) paves the way for practical applications of dissipationless quantum Hall edge states.

Jiawei Ji - The University of Calgary

Quantum circuits based only on matchgates are able to perform non-trivial (but not universal) quantum algorithms. Because matchgates can be mapped to non-interacting fermions, these circuits can be efficiently simulated on a classical computer. One can perform universal quantum computation by adding any non-matchgate parity-preserving gate, implying that interacting fermions are natural candidates for universal quantum computation within the circuit model.

David Gosset, IBM TJ Watson Research Center

There is strong evidence that a sufficiently large fault-tolerant quantum computer would solve certain computational problems exponentially faster than any classical computer. How can quantum algorithms and complexity theory help guide the way forward in our current era of small and noisy quantum computers?

Andrew N. Cleland, University of Chicago

Superconducting qubits offer excellent prospects for manipulating quantum information, with good qubit lifetimes, high fidelity single- and two-qubit gates, and straightforward scalability (admittedly with multi-dimensional interconnect challenges). One interesting route for experimental development is the exploration of hybrid systems, i.e. coupling superconducting qubits to other systems.

Kyle Willick: Carbon Nanotube Mechanical Resonators - Magnetic force detection and fast sensing

Suspended carbon nanotube (CNT) resonators have demonstrated excellent sensitivity in mass and force sensing applications to date. I will introduce these mechanical resonators, and how they can be combined with magnetic field gradients to realize magnetic moment readout.

Hydrogen and hydride superconductors, a new path to room temperature superconductivity?

The recent discovery of superconductivity in H₃S under high pressure by the group of Mikhail Eremets at the record breaking temperature of 203 K has opened a whole new path to potential room temperature superconductivity. I will describe recent experiments designed to verify the pairing mechanism in this new material using infrared spectroscopy.

Jeongmin Park - Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS) Department of Energy Science, Sungkyunkwan University

The combination of two-dimensional (2D) materials and functional oxide has been attracted in electrical transport study. Many researchers expected synergetic performance from this interesting structure. And the field effect transistor (FET) scheme was widely used to study it. Here, we successfully demonstrated graphene FET device which is fabricated on top of SrTiO3 (STO).

Matthew Day, University of Bristol and National Physical Laboratory, UK

Trapped ions are one of the most mature platforms for quantum information processing, quantum-enhanced sensing, and precision spectroscopy. Scaling to large numbers of trapped ions remains an open, technological challenge that would help advance the functionality and usefulness of the platform. The production of ion microtrap arrays, fabricated using MEMS techniques, has provided a key component to this scaling challenge.

Speaker: Viona Duncan

Nikolai Lauk, University of Calgary

Realization of a quantum network that enables ecient long-distance entanglement distribution would allow for multiple impressive applications with quantum key distribution being the most prominent one.