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Physics Colloquium: Universality at infinite temperature
Add to Calendar 2020-02-27T20:45:00 2020-02-27T21:45:00 UTC Physics Colloquium: Universality at infinite temperature

Physics Colloquium

Osmond Lab (117)
Start DateThu, Feb 27, 2020
3:45 PM
to
End DateThu, Feb 27, 2020
4:45 PM
Presented By
Romain Vasseur, University of Massachusetts

Physics Colloquium

In this talk, I will argue that the concepts of quantum criticality and universality can emerge at very high energy, corresponding to infinite effective temperatures. I will focus on isolated many-body quantum systems that fail to self-thermalize in isolation, either because of strong randomness, or proximity to integrable points with an extensive number of conserved quantities. I will discuss the recently discovered anomalous hydrodynamics of certain quantum spin chains at high temperature; and argue that a broad class of systems can exhibit anomalous transport with universal exponents, uncovering a rich dynamical phase diagram even at infinite temperature.