Special 290S/290K Quantum Materials Seminar speaker Ethan Lake (MIT) Thursday, October 27 at 4 pm in Physics South 402

Time/Venue Thursday, October 27 at 4 pm in Pacific time in Physics South 402 and via Zoom:

Meeting ID: 995 2349 9113 Passcode: 600704
Host Ehud Altman
Title Renormalization group quantum circuits for 1d SPT phases
Abstract Suppose one is handed the ground state wavefunction of a local Hamiltonian. How does one determine the phase of matter that this ground state belongs to? In this talk, I will describe a way of answering this question for 1d symmetry protected topological phases using `RG quantum circuits’: unitary circuits that test whether or not their inputs belong to a particular phase. These circuits are constructed from only a small amount of universal data, and simulate renormalization group flow with the help of a simple error correction protocol. This talk is based on soon-to-appear work with Shankar Balasubramanian and Soonwon Choi.

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