Professor

Martin Fisher School of Physics

Brandeis University

E-mail: `mph(at)brandeis.edu`

My Brandeis Physics Department page

My Brandeis University page

Office: Abelson 313

Office hours: 4-5pm Fridays (starting Sept. 10) and by appointment

I am a member of the Brandeis Quantum and Gravitational Theory Group. My research spans a variety of areas of theoretical and mathematical physics, including string theory, quantum field theory, quantum gravity, general relativity, geometry, quantum information theory, statistical mechanics, and convex optimization. Recently, the main focus of my work has been on the use of concepts and tools from quantum information theory, such as entanglement entropies, to better understand field theories, gravitational theories, and holographic dualities connecting them.

My work is supported by grants from the U.S. Department of Energy and by *It from Qubit: Simons Collaboration on Quantum Fields, Gravity, and Information*, a multi-institution grant from the Simons Foundation of which I serve as Deputy Director.

We are always looking for talented graduate students to join our group. If you are interested, please apply to our Ph.D. program. (I read applications only through the university's admissions process; please do not send your CV or other application materials directly to me.)

During Fall 2021, I am teaching Physics 30a: Electromagnetism and Physics 164a: First-year Tutorial. I also serve as Graduate Advising Head for the Physics Department.

More about me and my work:

Slides & videos from talks I've given recently:

*Black Holes, Quantum Entanglement, and the Geometry of Spacetime*(colloquium-level lunch talk, MIT, 2020)*Bit Threads for Multiple Regions*(New England Strings Meeting, Brown University, 2020), slides, video*Entanglement and the Geometry of Spacetime*(blackboard talk, KITP Teachers' Conference on Spacetime, Holography, and Entanglement, 2020)*Quantum Entanglement and the Geometry of Spacetime*(Weizmann Institute of Science physics colloquium, 2020)*Gravity, Entanglement, and Bit Threads*(Brandeis physics colloquium, 2019)

Also perhaps of interest:

- A popular-level article about holographic entanglement entropy I wrote for the newsletter of the International Centre for Theoretical Sciences, Bangalore (turn to page 4)
- A 5-minute podcast on the holographic principle
- My page of useful
*Mathematica*packages - A compendium of useful formulas, mostly lifted from various textbooks such as Wald's
*General Relativity*and Polchinski's*String Theory*, together with a few of my own shallow insights