AF: Small: Long-time coherence protection via dynamical decoupling and encoded control

该奖项旨在研究结合无源(动态解耦)和有源(量子纠错)技术的量子比特相干保护理论。动态解耦非常省钱，因为它不需要任何额外的量子比特来工作；它将用于物理量子比特级别，作为相干保护的第一阶段。对于几种固态量子比特实现，这可能会将量子纠错要处理的消相干速率抑制一个数量级或更多，从而显著降低硬件要求。PI计划使用分析和数值技术，与环境的相关时间相比较，分析这种组合相干保护方案在长时间间隔上的有效性。

This award targets the study of the theory of qubit coherence protection combining passive (dynamical decoupling) and active (quantum error correction) techniques. The dynamical decoupling is very frugal as it does not require any additional qubits to work; it will be used at the level of physical qubits as the first stage of coherence protection. For several solid-state qubit implementations, this may suppress the decoherence rate to be dealt with by the quantum error correction by an order of magnitude or more, thus dramatically reducing the hardware requirements. The PI plans to analyze the effectiveness of such a combined coherence protection scheme over long time intervals, when compared to the correlation time of the environment using both analytical and numerical techniques.