Introduction to Research
My research describes the connection between physical properties of modern quantum materials and the nature of quantum entanglement in the many-particle wavefunction. I have worked extensively on the description of the diverse varieties of entangled states of quantum matter. These include states with topological order, with and without an energy gap to excitations, and critical states without quasiparticle excitations. Many of my theories have been linked to experiments, especially to the rich phase diagrams of the high temperature superconductors.
Extreme examples of complex quantum entanglement arise in metallic states of matter without quasiparticle excitations, often called strange metals. Remarkably, there is an intimate connection between the quantum physics of strange metals found in modern materials (which can be studied in tabletop experiments), and quantum entanglement near black holes of astrophysics. This connection is seen most clearly in the Sachdev-Ye-Kitaev (SYK) model, which employs a common set of equations to describe the quantum dynamics of certain strange metals and black holes.
For more information, see this Wikipedia page,
my YouTube channel, and my lectures on
the Perimeter Institute Archive
and at KITP, Santa Barbara.
- Public lecture on Ultra-spooky action at a distance: from quantum materials in the lab to black holes
[PDF; Keynote; Video], Simons Foundation, New York, January 21, 2020
- Cafe talk on Quantum entanglement: "Spooky action at distance"
in the lab,
and in black holes
[PDF; Keynote; Video],
Tilde Cafe, Branford CT, November 9, 2019.
- Interview with Dirac Medal Winners, International Centre for Theoretical Physics, Trieste, March 28, 2019.
- Chai with Manju, Interview with INE News, Oct 22, 2018.
- Interview in the Times of India, Sep 11, 2018.
- Black Holes and Revelations, Discover magazine, November 2017, page 70.
- Public Lecture on Quantum entanglement, strange metals, and black holes, Simons Foundation, New York, February 8, 2017 [PDF; Keynote; Video]
- Taming Superconductors
With String Theory, Interview in Quanta Magazine, January 21, 2016. Also in Scientific American.
- Dirac Lecture [PDF, Video] on Quantum Entanglement and Superconductivity at the University of New South Wales upon receiving the Dirac Medal
for the Advancement of Theoretical Physics, September 1, 2015.
- Public Lecture on
Quantum Entanglement and Superconductivity,
Perimeter Institute for Theoretical Physics,
Waterloo, Canada, October 1, 2014 [Video; PDF; Keynote; Trailer; Interview 1; Interview 2].
- Biography at the National Academy of Sciences
- Public Lecture (Video) on Quantum Entanglement and Superconductivity, Wheeler Opera House, Aspen CO, March 18, 2014, hosted
by the Aspen Center for Physics
- Videos of the Salam Distinguished Lectures 2014,
International Center for Theoretical Physics, Trieste, Italy, January 27-30, 2014.
- Interview at the International Center for Theoretical Physics, Trieste, Italy, January 28, 2014.
- Strange and Stringy, article on the connections between
condensed matter physics and string theory, Scientific American 308, 44 (January 2013)
- A profile and an interview in the Harvard Gazette.