physics

Mohammad Hafezi

Mohammad Hafezi 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 Mohammad Hafezi rather than just read about it. In short: Mohammad Hafezi is a physicist and the Minta Martin Professor at the University of Maryland, College Park, where he holds a joint appointment in the Department of Physics and the Department of Electrical and Computer Engineering. He is a Fellow of the Joint Quantum Institute (JQI), a joint institute of the University of Maryland and the National Institute of Standards and Technology.

Key takeaways

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

Reference excerpt

Mohammad Hafezi is a physicist and the Minta Martin Professor at the University of Maryland, College Park, where he holds a joint appointment in the Department of Physics and the Department of Electrical and Computer Engineering. He is a Fellow of the Joint Quantum Institute (JQI), a joint institute of the University of Maryland and the National Institute of Standards and Technology. In 2021, he was elected a Fellow of the American Physical Society "for pioneering theoretical and experimental work in topological photonics and quantum synthetic matter".

Early life and education As a student, Hafezi won a silver medal at the 29th International Physics Olympiad, held in Reykjavík, Iceland, in 1998. He studied for two years at Sharif University of Technology before completing his undergraduate degree in physics at the École Polytechnique in France in 2003. He received his PhD in physics from Harvard University in 2009.

Career After his doctorate, Hafezi was a research associate at the Joint Quantum Institute before joining the University of Maryland faculty in 2014. He was promoted to full professor with tenure in 2021 and holds the Minta Martin professorship. He is a Fellow of the Joint Quantum Institute and the Quantum Technology Center, and an affiliate of the Joint Center for Quantum Information and Computer Science at Maryland.

Research Hafezi's research involves theoretical and experimental investigation of quantum properties of light-matter interaction, for applications in classical and quantum information processing and sensing. Early in his career, Hafezi worked on quantum simulation proposals of systems that host topologically ordered many-body states on a lattice, of the kind later called fractional Chern insulators. In particular, he proposed schemes for realizing fractional quantum Hall states with ultracold atoms in optical lattices. Because neutral atoms do not couple directly to a magnetic field, such proposals required synthesizing an effective (artificial) gauge field to reproduce the physics of charged particles in a magnetic field. Following this work on neutral atoms, Hafezi turned to exploring topological physics for other neutral particles—in particular photons—which similarly do not experience a magnetic field directly. In 2011, Hafezi and collaborators proposed that photons in arrays of coupled optical ring resonators could exhibit topologically protected edge transport, providing robustness against fabrication disorder. His team subsequently demonstrated topological edge states of light on a silicon chip and the first direct measurement of topological invariants in a photonic system. His group extended these ideas to quantum light, demonstrating a topological source of quantum light based on correlated photon pairs and, with collaborators, a topological interface for quantum emitters. In 2024, his group reported the observation of topological frequency combs in nested photonic resonator arrays. His research group also studies the use of quantum-optical techniques to probe and control correlated electron systems.

Honors and awards 1998 – Silver medal, 29th International Physics Olympiad (Reykjavík, Iceland) 2015 – Sloan Research Fellowship, Alfred P. Sloan Foundation 2015 – Young Investigator Program award, Office of Naval Research 2019, 2020 – Finalist, Blavatnik National Awards for Young Scientists, Physical Sciences & Engineering 2020 – Simons Investigator in Physics, Simons Foundation 2021 – Fellow of the American Physical Society, "For pioneering theoretical and experimental work in topological photonics and quantum synthetic matter." 2025 – Humboldt Research Award, Alexander von Humboldt Foundation

References

External links Profile at the Joint Quantum Institute

Worked examples

Example 1 — a first encounter with Mohammad Hafezi

Start with the simplest possible case. Write down what Mohammad Hafezi 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 Mohammad Hafezi 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 Mohammad Hafezi 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 Mohammad Hafezi

In research: Mohammad Hafezi 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 Mohammad Hafezi 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: Mohammad Hafezi is common in secondary-school and first-year university syllabi. It links to neighbouring topics 21st-century American physicists, Fellows of the American Physical Society, Harvard University alumni, so understanding it makes those chapters shorter.
In everyday life: Look for Mohammad Hafezi 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.

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How to study Mohammad Hafezi in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Mohammad Hafezi 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 Mohammad Hafezi out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mohammad Hafezi in simple terms?

Why does Mohammad Hafezi 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 Mohammad Hafezi?

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 Mohammad Hafezi.