基于Ramsey模式的超导量子寄存器皮秒操作
Picosecond operations on superconducting quantum register based on Ramsey patterns
摘要：
提出了一种超快量子比特控制概念，以减少单个和多个超导量子比特的操作持续时间。它是基于产生拉姆齐条纹由于单极皮秒控制脉冲。这个概念中的关键作用是量子比特态粒子数波在时间上向前和向后传播的干涉。在Ramsey范式的框架下揭示了控制脉冲的形状和持续时间对干涉图样对比度的影响。协议的观察拉姆齐振荡和实施各种门操作。我们还提出了一个概念性的工程解决方案，以创建所需的皮秒控制脉冲与所需的形状和幅度。结果表明，这使得控制系统的量子态的保真度达到99%以上成为可能。
英文摘要：
An ultrafast qubit control concept is proposed to reduce the duration of operations with a single and multiple superconducting qubits. It is based on the generation of Ramsey fringes due to unipolar picosecond control pulses. The key role in the concept is played by the interference of waves of qubit states population propagating forward and backward in time. The influence of the shape and duration of control pulses on the contrast of the interference pattern is revealed in the frame of Ramsey's paradigm. Protocols for observation of Ramsey oscillations and implementation of various gate operations are developed. We also suggest a notional engineering solution for creating the required picosecond control pulses with desired shape and amplitude. It is demonstrated that this makes it possible to control the quantum states of the system with the fidelity of more than 99%.
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