physics

Graeme Smith (physicist)

Graeme Smith (physicist) is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Graeme Smith (physicist) rather than just read about it. In short: Graeme Smith is a Canadian physicist specializing in quantum information theory and quantum computing. He is an associate professor in the Department of Applied Mathematics at the University of Waterloo and a faculty member at the Institute for Quantum Computing (IQC) at Waterloo.

Key takeaways

Graeme Smith (physicist) belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Graeme Smith (physicist) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Graeme Smith (physicist) from memory before moving on to harder problems.

Reference excerpt

Graeme Smith is a Canadian physicist specializing in quantum information theory and quantum computing. He is an associate professor in the Department of Applied Mathematics at the University of Waterloo and a faculty member at the Institute for Quantum Computing (IQC) at Waterloo. Smith was previously a researcher at IBM's Thomas J. Watson Research Center and later a professor at the University of Colorado Boulder, where he was a Fellow of JILA and served as director of the Center for Theory of Quantum Matter. He is known for contributions to quantum communication theory, including the discovery of superactivation of quantum channel capacity (where two quantum channels each with zero capacity can together have a positive capacity). In 2023, he was elected a Fellow of the American Physical Society for his contributions to quantum information physics.

Early life and education Smith earned his Bachelor of Science in physics from the University of Toronto in 2001, and went on to receive a Master of Science in 2004 and a Ph.D. in 2006 in physics from the California Institute of Technology. His doctoral research at Caltech was supervised by theoretical physicist John Preskill.

Career After completing his Ph.D., Smith worked as a postdoctoral researcher in the Department of Computer Science at the University of Bristol from 2006 to 2007. He then joined the IBM T.J. Watson Research Center, where he was a postdoctoral fellow from 2007 to 2010 and subsequently a Research Staff Member from 2010 until 2016. In 2016, Smith was appointed as an assistant professor of physics at the University of Colorado Boulder. At Colorado, he became a Fellow of JILA (the joint institute of CU Boulder and NIST) and later served as the director of CU Boulder's Center for Theory of Quantum Matter. He was promoted to associate professor at Colorado and remained on the faculty there until 2023. In July 2023, Smith joined the University of Waterloo as a faculty member of the Institute for Quantum Computing and an associate professor in the Department of Applied Mathematics. He also became an affiliate of the Perimeter Institute for Theoretical Physics and retains an adjoint affiliation with JILA.

Research Smith's research focuses on the theory of quantum information—extending classical information theory (Shannon theory) to quantum mechanical systems—and the fundamental limits of information storage, transmission, and processing in quantum systems. He has worked on problems in quantum error correction, quantum channel capacities, quantum communication in noisy environments, and the mathematical properties of entropy in quantum mechanics. In 2008, Smith and fellow researcher Jon Yard discovered the phenomenon of superactivation of quantum channel capacity: they showed that there exist pairs of quantum communication channels, each with zero quantum capacity on its own, that can have a positive capacity when used together. This counterintuitive result, published in Science, was the first example of a quantum channel capacity superactivation and demonstrated that quantum information channels can exhibit non-additivity in their capacities. Smith has also contributed to proving continuity bounds for quantum channel capacities and classified conditions under which certain entropic formulas remain additive in quantum information theory. He is an advocate for accurate science communication in quantum computing, often countering misconceptions about the field in public forums.

Awards and honors Fellow of the American Physical Society (APS) – Elected in 2023 for "fundamental contributions on quantum channel capacities including proving continuity, elucidating the phenomenon of superactivation, and providing a classification of all the additive entropic formulas." NSF CAREER Award – Received in 2017 from the U.S. National Science Foundation for early-career research excellence (grant CCF-1652560). Outstanding Postdoctoral Mentor Award, University of Colorado Boulder – Awarded in 2021 for excellence in mentoring postdoctoral researchers. Faculty of Mathematics Golden Jubilee Research Excellence Award – University of Waterloo, 2024 (mid-career category), recognizing outstanding research contributions.

References

External links Faculty webpage

Worked examples

Example 1 — a first encounter with Graeme Smith (physicist)

Start with the simplest possible case. Write down what Graeme Smith (physicist) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Graeme Smith (physicist) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Graeme Smith (physicist) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Graeme Smith (physicist)

In research: Graeme Smith (physicist) appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Graeme Smith (physicist) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Graeme Smith (physicist) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Academic staff of the University of Waterloo, California Institute of Technology alumni, Canadian physicists, so understanding it makes those chapters shorter.
In everyday life: Look for Graeme Smith (physicist) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Graeme Smith (physicist)” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Graeme Smith (physicist) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Graeme Smith (physicist) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Graeme Smith (physicist) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Graeme Smith (physicist) in simple terms?

Why does Graeme Smith (physicist) matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Graeme Smith (physicist)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Graeme Smith (physicist).