PME Special Quantum Seminar - Kyungjoo Noh

Reducing resource overheads of achieving fault tolerance in quantum information processing

Quantum error correction (QEC) is an essential ingredient for realizing fault-tolerant quantum information processing, providing a mean to systematically suppress noise in realistic quantum hardware. However, a major challenge of QEC is that substantial resource overheads are required to detect and correct errors. In this talk, I will present various ways to reduce resource overheads of achieving fault tolerance in quantum information processing. In the first part of the talk, I will give an overview of bosonic QEC and show how the infinite dimensionality of a bosonic Hilbert space can be utilized to reduce the resource overheads of QEC. As a concrete example, I will present an experimental demonstration of hardware-efficient QEC using a repetition cat code in which noise-biased bosonic cat qubits are concatenated with a simple, onedimensional repetition code. In the second part of the talk, I will discuss resource overheads associated with performing logical gates between error-corrected logical qubits. In particular, I will review basic ideas behind magic-state distillation protocols and present a hardware-efficient way to prepare a high-fidelity magic state using triangular color codes. I will conclude the talk with a discussion of possible future research directions.

Zoom: https://uchicago.zoom.us/j/93387023158?pwd=YTyI9vLzBbb22NX0pYK19O17HeaI…

Meeting ID: 933 8702 3158

Passcode: 439571

Host: Aashish Clerk