Royer Baptiste, Singh Shraddha, Girvin S M
Department of Physics, Yale University, New Haven, Connecticut 06520, USA.
Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.
Phys Rev Lett. 2020 Dec 31;125(26):260509. doi: 10.1103/PhysRevLett.125.260509.
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.
我们引入了一种处理戈特斯曼-基塔耶夫-普雷斯基尔（GKP）态的新方法，该方法以精确的方式处理其有限能量版本。基于此分析，我们开发了新的量子比特-振荡器电路，该电路能自主稳定GKP流形，在不依赖量子比特测量的情况下纠正错误。最后，我们通过数值模拟表明，当由这些新电路稳定时，编码在GKP态中的逻辑信息对典型的振荡器噪声源具有很强的鲁棒性。
