Future graduate students
IQC outreach welcomes elementary school students
This winter term, the Institute for Quantum Computing (IQC) welcomed seventeen elementary school classes to our Institute to learn about quantum information science and technology, as well as ion trapping.
IQC researchers honoured for excellence in scientific outreach
The David Johnston Award for Scientific Outreach recognizes students who have shown an outstanding commitment to promoting public awareness of quantum research through scientific outreach and community engagement. The Institute for Quantum Computing (IQC) is proud to announce this year's award recipients: Stephen Harrigan, Sarah (Meng) Li, and Alev Orfi.
IQC Student Seminar featuring Emma Bergeron
Development of InSb Surface Quantum Wells for hybrid superconducting device applications.
Abstract: Surface quantum well (QW) heterostructures in III-V semiconductors are compatible with proximitized superconductivity and offer a scalable planar platform for superconductor-semiconductor systems, such as those suggested for topological quantum computation and those suitable for topological phase transitions involving Majorana zero modes. Amongst III-V binary semiconductors, Indium Antimonide (InSb) has the smallest electron effective mass, highest spin orbit coupling and largest Land´e g-factor. Such material properties makes the pursuit of InSb QWs desirable for a number of quantum device applications, including quantum sensing, quantum metrology, and quantum computing.
Unfortunately, high quality two-dimensional electron gases (2DEGs) in InSb QWs have so far been difficult to realize. InSb QWs have generally relied on the use of modulation doping for 2DEG formation, but these structures have frequently reported issues with parasitic parallel conduction and unstable carrier densities. We report on the transport characteristics of field effect 2DEGs in surface InSb quantum wells which overcome these challenges and are suitable for future hybrid superconducting device applications.
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IQC members awarded millions in NSERC Quantum Alliance funding
In the first allocation of NSERC Alliance Quantum Grant funding, announced today by NSERC, many faculty members, affiliates, and alumni of the Institute for Quantum Computing (IQC) are leading or collaborating on projects receiving support.
IQC celebrates world quantum day
At the Institute for Quantum Computing (IQC), every day is a quantum day. But today, on April 14th, we are especially excited to join a community of scientists around the world in the celebration and promotion of the public understanding of quantum science and technology.
IQC Student Seminar featuring Andrew Jena
AEQuO: A Comprehensive Measurement Allocation Protocol
Another Round of Breaking and Making Quantum Money: How to Not Build It from Lattices, and More
IQC Colloquium on ZOOM - Mark Zhandry, NTT Research
Public verification of quantum money has been one of the central objects in quantum cryptography ever since Wiesner's pioneering idea of using quantum mechanics to construct banknotes against counterfeiting. In this talk, I will discuss some recent work giving both attacks and new approaches to building publicly verifiable quantum money.
Exploring by the Seat of Your Pants: Experiments in the Quantum Realm
Quantum mechanics helps us understand what happens below what a microscope can see, describing the world of atoms, electrons, photons, and more. In celebration of World Quantum Day on April 14th, Dr. John Donohue from the Institute for Quantum Computing will sit down with Exploring by the Seat of Your Pants to explore quantum science and its applications, from light particles and electron waves to superconductors and quantum computers.
Quantum Matters Seminar Series: No, you have not discovered a Majorana Fermion
No, you have not discovered a Majorana Fermion
Abstract: Is what I tell myself. There was a time when I thought I may have discovered it, others did too. Around 2012 several groups including ours found evidence of these quantum excitations in electrical circuits containing nanowires of semiconductor covered by a superconductor. The dramatic signatures were peaks in conductance that appeared under conditions expected from theory for Majorana modes, which are their own anti-modes and may possess non-Abelian properties. But a few years later, similar features in the data were identified due to an interesting, but a more mundane effect - which we call trivial states such as Andreev bound states. Over time more and more data pointed at the trivial and not at the exotic explanation. But because Majorana claims kept coming, this led to some digging and even retractions. What we learned after 10 years is that we have a much better handle on what effects show up in these nanowires, which positions us well for the ultimate Majorana discovery which we should be able to tell apart from all the non-Majorana things we saw. The second lesson we learned is that materials quality of device constituents, superconductors and semiconductors, as well as how samples are fabricated - are the make-or-break factors for making this happen. So while I cannot report an exciting physics discovery, I can walk you through the scientific process that took place, a 10-year event of independent value which taught me how to do science better.
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