Jan 2021 Virtual Meeting

Schedule (all time in California time PST)

Jan 13 Wednesday

09:00-09:45am Benoit Vermersch (University Grenoble-Alpes & IQOQI Innsbruck):
"Probing Scrambling Using Statistical Correlations between Randomized Measurements: Protocol and Experiment"

Abstract: I will first present a protocol to measure out-of-time-ordered correlators (OTOCs) using statistical correlations between measurements, which are performed after evolving a quantum system from random initial states [1]. Our protocol requires neither reversing time evolution nor auxiliary degrees of freedom, and can be realized in state-of-the-art quantum simulation experiments. Then, I will present an experimental realization of this protocol demonstrating quantum information scrambling on a 10-qubit trapped-ion quantum simulator representing a tunable long-range interacting spin system [2]. [1] https://doi.org/10.1103/PhysRevX.9.021061 [2] https://doi.org/10.1103/physrevlett.124.240505

10:15-10:45am Vedika Khemani (Stanford):
"Postselection free entanglement dynamics via spacetime duality"

10:45-11:15am Ehud Altman (UC Berkeley):
"Dirac fast scramblers"

11:15-11:45am Liz Wildenhain (UC Berkeley):
"Black Hole Cannibalism"

Abstract: I will present a version of the Hayden-Preskill thought experiment in which the message thrown into the black hole is itself a smaller black hole. I will discuss the implications of the existence of a recovery channel for this black hole message at asymptotic infinity, resulting in a sharpening of the black hole information paradox for observers who never need to approach a horizon. I will suggest decoherence mechanisms as a way of resolving this sharpened paradox.



13:00-13:30pm Vincent Su (UC Berkeley):

"Preparing the SYK Thermofield Double on a Quantum Computer"

13:30-14:00pm Brian Swingle (Brandeis):

"Hydrodynamic Theory of the Connected Spectral Form Factor"

14:00-14:30pm Geoff Penington (UC Berkeley):
"Quantum Minimal Surfaces from Quantum Error Correction"

Abstract: Following work by Maldacena and Qi, the thermofield double of the SYK model can be (approximately) prepared as the ground state of a slightly perturbed Hamiltonian. In this talk, I will introduce the variational quantum circuits and how to optimize them when the circuits no longer fit in a classical computer. Numerical results for up to 12 Majoranas per side will be presented.

14:45-15:45pm
Discussion session (Internal only)