INTRODUCING THE SUPERCONDUCTING SADDLE POINT QUBIT
Abstract
Quantum devices are extremely sensitive to noise, which presents the major challenge in developing robust quantum technologies. In contrast, digital technologies rest on the existence of stable states of matter that retain classical information over long times. Fundamentally, this is because stable classical states of matter physically embody an error correcting code. Ferromagnet domains in hard disks exemplify this principle by energetically implementing a repetition code amongst many coupled electronic spins. Is there an analogously stable quantum phase of matter that retains quantum information robustly? This is a long-standing open problem in quantum physics. This project will pursue a new direction in this search by introducing and analysing a new kind of solid-state quantum bit (qubit), which physically embodies a quantum error correcting code known as the Gottesman-Kitaev-Preskill (GKP) code . This new system, which we call the “saddle-point” qubit, is based on the conjunction of two superconducting circuit elements: the Josephson junction and the Quantum Phase Slip device.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 11, 2021
- Source ID
- FA23862014006
Entities
People
- Tom Stace
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Queensland