Today, we’re celebrating some of the female-identifying engineers in our community by showcasing their remarkable achievements, experiences, and valuable guidance for those aspiring to help build a brighter future.
The rise of quantum information theory has largely vindicated the long-held belief that Wigner negativity is an indicator of genuine nonclassicality in quantum systems. This thesis explores its manifestation in spin-j systems using the spherical Wigner function. Common symmetric multi-qubit states are studied and compared. Spin coherent states are shown to never have vanishing Wigner negativity. Pure states that maximize negativity are determined and analyzed using the Majorana stellar representation. The relationship between negativity and state mixedness is discussed, and polytopes characterizing unitary orbits of lower-bounded Wigner functions are studied. Results throughout are contrasted with similar works on symmetric state entanglement and other forms of phase-space nonclassicality.
The inaugural networking conference brought together over 150 quantum professionals from government, industry and academic sectors to foster collaborations and create connections over two days. Quantum Connections attendees critically examined the challenges we face as a country within the landscape of quantum and had proactive conversations considering Canada’s quantum future.
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.
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.
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.
Quantum communication has revolutionized the way we approach information processing and transmission. Building on the principles of quantum mechanics, quantum communication technologies offer capabilities that are impossible with classical communication.
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.
Fluctuation theorems provide powerful computational tools to study thermal equilibrium. Building upon these theorems, I will present a quantum algorithm to prepare the thermal state of a quantum system H1, at inverse temperature β≥0, from the thermal state of a quantum system H0.
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.