论文标题
使用强大的经典驱动器增强了前景超快几何量子计算
Enhanced-Fidelity Ultrafast Geometric Quantum Computation Using Strong Classical Drives
论文作者
论文摘要
我们提出了一种一般方法，以实施超出旋转波近似（RWA）的非绝热几何单位和两倍的门。该协议与以前的RWA协议中使用的大多数最佳控制方法兼容；因此，它像RWA协议一样强大（甚至比）。使用反旋转效果使我们能够应用强驱动器。因此，与实施高保真性（$ \ geq 99.99 \％$）门的RWA同行相比，我们可以将门速度提高5--10倍。这种超快的进化（纳秒，甚至是皮秒）显着降低了破坏性的影响（例如，量子耗散和dephasing）。此外，由于反向旋转效应不再引起栅极不忠（在弱和强驾驶方案中），因此与RWA协议相比，我们可以实现更高的忠诚度。因此，在存在变质的情况下，可以用$ \ geq 99 \％$ fidelities实施超快几何量子门。
We propose a general approach to implement nonadiabatic geometric single- and two-qubit gates beyond the rotating wave approximation (RWA). This protocol is compatible with most optimal control methods used in previous RWA protocols; thus, it is as robust as (or even more robust than) the RWA protocols. Using counter-rotating effects allows us to apply strong drives. Therefore, we can improve the gate speed by 5--10 times compared to the RWA counterpart for implementing high-fidelity ($\geq 99.99\%$) gates. Such an ultrafast evolution (nanoseconds, even picoseconds) significantly reduces the influence of decoherence (e.g., the qubit dissipation and dephasing). Moreover, because the counter-rotating effects no longer induce gate infidelities (in both the weak and strong driving regimes), we can achieve a higher fidelity compared to the RWA protocols. Therefore, in the presence of decoherence, one can implement ultrafast geometric quantum gates with $\geq 99\%$ fidelities.
