Description:

Title: Self-correcting Quantum Code

Speaker: Dr. Eliot Kapit, Oxford University

Abstract: A physical realization of self-correcting quantum code would be profoundly useful for constructing a quantum computer. In this theoretical talk, I will review and provide partial solutions to the major challenges preventing self-correcting quantum code from being engineered in realistic devices. I consider a variant of Kitaev's toric code coupled to propagating bosons, which induce a long-ranged interaction between anyonic defects. By coupling the primary quantum system to an engineered dissipation source through resonant energy transfer, I demonstrate a "rate barrier" which leads to a potentially enormous increase in the system's quantum state lifetime through purely passive quantum error correction, even when coupled to an infinite temperature bath. While the mechanism is not scalable to infinitely large systems, the maximum effective size can be very large, and it is fully compatible with active error correction schemes. The model uses only on-site and nearest-neighbo r interactions, and could be implemented in superconducting qubits.

Keywords: Physics, Astronomy, CMP