Self-correcting GKP qubit and gates in a driven-dissipative circuit
arxiv(2024)
摘要
We propose a circuit architecture for a dissipatively error-corrected GKP
qubit. The device consists of a high-impedance LC circuit coupled to a
Josephson junction and a resistor via a controllable switch. When the switch is
activated via a particular family of stepwise protocols, the resistor absorbs
all noise-induced entropy, resulting in dissipative error correction of both
phase and amplitude errors. This leads to an exponential increase of qubit
lifetime, reaching beyond 10ms in simulations with near-feasible parameters. We
show that the lifetime remains exponentially long in the presence of extrinsic
noise and device/control imperfections (e.g., due to parasitics and finite
control bandwidth) under specific thresholds. In this regime, lifetime is
likely only limited by phase slips and quasiparticle tunneling. We show that
the qubit can be read out and initialized via measurement of the supercurrent
in the Josephson junction. We finally show that the qubit supports native
self-correcting single-qubit Clifford gates, where dissipative error-correction
of control noise leads to exponential suppression of gate infidelity.
更多查看译文
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要