论文标题
基于测量的量子反馈控制
State Initialization of a Hot Spin Qubit in a Double Quantum Dot by Measurement-Based Quantum Feedback Control
论文作者
论文摘要
开发了一种基于测量的量子反馈方案，用于在栅极定义的双量子点旋转量子QPIT量子QPIT与超导谐振器耦合的旋转状态初始化中开发。该协议可以改善量子状态初始化，因为它能够在较短的时间内稳健地准备旋转并达到更高的保真度，这可以预先设置。能够预先设置Fidelity的目标是高度期望的功能，使量子量初始化更具确定性。本文开发的协议在高温下也有效，这对于当前在扩大量子计算机中的量子数量的努力至关重要。
A measurement-based quantum feedback protocol is developed for spin state initialization in a gate-defined double quantum dot spin qubit coupled to a superconducting resonator. The protocol improves qubit state initialization as it is able to robustly prepare the spin in shorter time and reach a higher fidelity, which can be pre-set. Being able to pre-set the fidelity aimed at is a highly desired feature enabling qubit initialization to be more deterministic. The protocol developed herein is also effective at high temperatures, which is critical for the current efforts towards scaling up the number of qubits in quantum computers.
