Future graduate students

Young-June Kim: Alpha-RuCl3: a progress report

Abstract: A bond-dependent anisotropic magnetic interaction called the Kitaev interaction can be found in honeycomb lattice materials with strong spin-orbit coupling, which has made a profound impact on quantum magnetism research. In particular, alpha-RuCl3 has been heralded as a realization of the Kitaev quantum spin liquid state, an elusive new state of matter that harbours Majorana fermions. In this talk, I will give a brief overview of the current status of research on alpha-RuCl3 and discuss recent experimental developments and a few surprising findings using ultra-high-quality samples grown in our laboratory. Our samples have minimal stacking faults even at low temperatures, allowing us to determine the low-temperature crystal structure unambiguously. We also found that the magnetic properties are surprisingly sensitive to the inter-layer configuration, giving rise to various magnetic transition temperatures. We also compare low-energy spin-orbit excitations in various Kitaev materials using resonant inelastic x-ray scattering (RIXS). We found that non-local physics is important for describing the spin-orbit excitations in these materials, in contrast to the conventional belief that local Jeff=1/2 physics is sufficient in these compounds.

The Quantum Horizons: Quantum Information Science (QIS) Research and Innovation for Nuclear Science award from the U.S. Department of Energy's Office of Nuclear Physics has enabled a new collaboration between researchers who develop technologies for nuclear physics, quantum information science and high-energy physics. 

Yesterday, the Institute for Quantum Computing (IQC) held its first Colloquium of 2023, including an opportunity to connect to our community with pre-presentation coffee and tea, and a fantastic presentation featuring Dr. Stephanie Simmons titled Silicon Colour Centres.

Dr. Raymond Laflamme, founding director of the Institute for Quantum Computing (IQC) at the University of Waterloo, has been named Chair of the National Quantum Strategy’s (NQS) Quantum Advisory Council. The announcement was made today by the Honourable François-Philippe Champagne, Canada’s Minister of Innovation, Science and Industry. Laflamme will work in close collaboration with fellow Chair Dr. Stephanie Simmons, Chief Quantum Officer of Photonic and IQC affiliate. 

 

Join us for Quantum Today, where we sit down with researchers from the University of Waterloo’s Institute for Quantum Computing (IQC) to talk about their work, its impact and where their research may lead.

Cyberattacks and data breaches are an invisible but growing threat that is becoming more commonplace against the landscape of technological growth and development. Quantum cryptography offers data protection in our evolving digital spaces.

IQC Colloquium Featuring Dr. Stephanie Simmons - Photonic

The future global quantum internet will require high-performance matter-photon interfaces. The highly demanding technological requirements indicate that the matter-photon interfaces currently under study all have potentially unworkable drawbacks, and there is a global race underway to identify the best possible new alternative. For overwhelming commercial and quantum reasons, silicon is the best possible host for such an interface. Silicon is not only the most developed integrated photonics and electronics platform by far, isotopically purified silicon-28 has also set records for quantum lifetimes at both cryogenic and room temperatures ...

En français

What happens when a computer makes a ‘typo’ or error at the very fundamental level – if a zero accidentally becomes a one? In classical computers, we can use repetition in the binary signals to make computers tolerant to faults such as these.

IQC Colloquium Featuring Anupam Mazumdar, University of Groningen

We are led to create a massive and large spatial quantum superposition to probe the quantum nature of gravity in a laboratory. In particular, to witness the quantum entanglement mediated via the quantum nature of gravity, we will need to prepare a pure quantum state of mass 10^{-15} -10^{-14}Kg with a spatial quantum superposition of 10-100 microns and a coherence time of nearly 1-2 seconds. ...