2020/09/16 by Baptiste Royer, Shraddha Singh, S. M. Girvin · 1 citation
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physrevlett.125.260509
published as Phys. Rev. Lett. 125, 260509 (2020) · Main text: 6 pages, 4 figures. Supplemental material: 27 pages, 13 figures
arxiv created 2020/09/16 · arxiv updated 2021/01/04
We introduce a new approach to Gottesman-Kitaev-Preskill (GKP) states that treats their finite-energy version in an exact manner. Based on this analysis, we develop new qubit-oscillator circuits that autonomously stabilize a GKP manifold, correcting errors without relying on qubit measurements. Finally, we show numerically that logical information encoded in GKP states is very robust against typical oscillator noise sources when stabilized by these new circuits.