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Tuesday, September 22, 2020
1:00 PM - 2:00 PM
Online Event

IQI Weekly Seminar

1D Noisy Random Circuit Sampling & Experimental Aspects of Bosonic QEC
Kyungjoo Noh, Research Scientist, AWS Center for Quantum Computing,

Abstract: In the first half of the talk, I will present my recent work (https://quantum-journal.org/papers/q-2020-09-11-318/) on simulating 1D noisy RCS with matrix product operators (MPOs). I will demonstrate that, given a fixed non-zero error rate per gate, the MPO entanglement entropy peaks at an optimal circuit depth that depends only on the gate error rate and is bounded by a constant independent of the system size. Thus, above a characteristic system size, the time cost of classical MPO simulation only increases polynomially in the number of qubits. I will also briefly discuss a simple toy model based on erasure channels.

In the second half, I will give an overview of circuit-QED implementation of bosonic quantum error correction (QEC). I will review several key control techniques and discuss experimental realization of "break-even" QEC with cat, binomial, and GKP codes. I will also discuss challenges and possible future directions.

For more information, please contact Bonnie Leung by email at bjleung@caltech.edu.