physics

Vijay Balasubramanian

Vijay Balasubramanian 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 Vijay Balasubramanian rather than just read about it. In short: Vijay Balasubramanian (born 1969) is an American theoretical physicist and the Cathy and Marc Lasry Professor of Physics and Astronomy at the University of Pennsylvania. He has conducted research in string theory, quantum field theory, and biophysics (especially theoretical and computational neuroscience).

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Reference excerpt

Vijay Balasubramanian (born 1969) is an American theoretical physicist and the Cathy and Marc Lasry Professor of Physics and Astronomy at the University of Pennsylvania. He has conducted research in string theory, quantum field theory, and biophysics (especially theoretical and computational neuroscience). He has also worked on problems in statistical inference and machine learning. In 2024-25, Balasubramanian held the Eastman Professorship at Balliol College, University of Oxford, which is offered to one American scholar of distinction each year.

Biography Born in Mumbai, Balasubramanian spent his childhood in major Indian cities including New Delhi, Chennai, Kolkata, and Hyderabad. Among the elementary schools he attended are St. Mary's in Mumbai, St. Xavier’s in Kolkata, and St. Columba’s in New Delhi. His family later moved to Jakarta, Indonesia, where he attended Jakarta International School (JIS). After graduating from JIS, he moved to the United States and attended the Massachusetts Institute of Technology (MIT), where he earned B.S. degrees in Physics and Computer Science and an M.S. degree in Computer Science. While a student at MIT, he worked at CERN (the European Organization for Nuclear Research) and the Xerox Palo Alto Research Center (Xerox PARC). For this work at Xerox PARC, he received two patents in speech recognition. Vijay Balasubramanian completed his doctoral studies at Princeton University, where he received a Ph.D. in Physics in 1997 under the supervision of Curtis Callan. He then moved to Harvard University as a Junior Fellow of the Harvard Society of Fellows. During this time, he was also a fellow-at-large of the Santa Fe Institute. Since 2000, he has been a professor at the University of Pennsylvania where he currently holds the Cathy and Marc Lasry Chair in Physics and where he has a secondary appointment in the School of Medicine, Department of Neuroscience. In 2013, he co-founded the Computational Neuroscience Initiative at Penn. In October 2021, he was a featured speaker in the Netflix documentary series Explained, in the episode on "Time." In 2022, Quanta Magazine featured him in an article and video in which he discussed connections between physics, computer science, neurosciences, and humanities fields such as literature. Quanta described him as a "polymath who is prone to leaping from string theory to Proust in mid-conversation." In 2023, the Catalan-language daily newspaper of Barcelona, Ara, featured him in an article in which he discussed the relative powers and limits of the human brain and of Artificial Intelligence, and what physics can bring to the study of theoretical and computational neuroscience. Balasubramanian also spoke on Aspen Public Radio with physicist Lisa Randall and composers Chris Theofanidis and John Luther Adams on music, science, and creativity.

Affiliations Vijay Balasubramanian has been a research associate and visiting professor at many institutions. These include Rockefeller University; the City University of New York (CUNY) Graduate Center; the École Normale Supérieure (ENS) in Paris, France; the International Centre for Theoretical Physics (ICTP) in Trieste, Italy; the Vrije Universiteit Brussel (VUB) in Brussels, Belgium; the University of Oxford in the UK; and the International Centre for Theoretical Sciences (ICTS) in Bangalore, India. In 2007–8, he was a fellow at the Institute for Advanced Study (IAS) (Princeton), supported by an IAS grant from Helen and Martin Chooljian. Since 2011, he has been a General Member of the Aspen Center for Physics in Aspen, Colorado. In 2022, he became an External Professor of the Santa Fe Institute.

Honors Vijay Balasubramanian has won many prizes and fellowships. In 2005, Balasubramanian won first prize in the Gravity Research Foundation essay competition, with his colleagues Don Marolf and Moshe Rozali for an essay on “Information Recovery from Black Holes”. In 2006, he won the Ira H. Abrams Award for Distinguished Teaching – the highest teaching award given by the School of Arts and Sciences at the University of Pennsylvania. In 2012-13 he won a fellowship from the Fondation Pierre-Gilles de Gennes, which he held at the École Normale Supérieure (ENS) in Paris, France. In 2015, Balasubramanian was part of the international team of string theorists, computer scientists, and quantum information theorists that won a major grant from the Simons Foundation in New York to investigate the emergence of the fabric of spacetime from information. Their project was entitled, "It from Qubit: Simons Collaboration on Quantum Fields, Gravity, and Information". In 2019, the American Physical Society honored Balasubramanian by recognizing him as a Fellow of the society. His citation as a 2019 APS Fellow noted his "fundamental contributions clarifying the black hole information puzzle and black hole thermodynamics through work on the duality of quantum gravity and quantum field theory, and on black hole microscopics in theories of quantum gravity". In 2024-25, Balasubramanian held the Eastman Professorship at Balliol College, University of Oxford.

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Illustrations

Worked examples

Example 1 — a first encounter with Vijay Balasubramanian

Start with the simplest possible case. Write down what Vijay Balasubramanian 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 Vijay Balasubramanian 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 Vijay Balasubramanian 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 Vijay Balasubramanian

In research: Vijay Balasubramanian 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 Vijay Balasubramanian 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: Vijay Balasubramanian is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1969 births, American scientists of Asian descent, Aspen Center for Physics people, so understanding it makes those chapters shorter.
In everyday life: Look for Vijay Balasubramanian 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 Vijay Balasubramanian in 20 minutes

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Frequently asked questions

What is Vijay Balasubramanian in simple terms?

Why does Vijay Balasubramanian 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 Vijay Balasubramanian?

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 Vijay Balasubramanian.