论文标题
量子点混合量子量的闩锁读数
Latched readout for the quantum dot hybrid qubit
论文作者
论文摘要
读取量子点混合量子乘以的主要方法涉及逻辑基础对不同电荷状态的投影，这些电荷状态很容易被集成电荷传感点检测到。但是，在最简单的配置中，激发的充电状态迅速衰减，从而使单一读数具有挑战性。在这里，我们演示了一个读取过程，将Qubit激发态锁定到亚稳态的电荷配置中，其寿命为隧道速率有限，在此持续到2.5 ms。此外，我们表明，在（4,1） - （3,2）电荷配置中工作可以实现一个比典型的电荷配置更大且更可调的闩锁读数窗口，因为读取窗口的大小是由轨道拆分而不是山谷分开确定的。
A primary method of reading out a quantum dot hybrid qubit involves projection of the logical basis onto distinct charge states that are readily detected by an integrated charge sensing dot. However, in the simplest configuration, the excited charge state decays rapidly, making single-shot readout challenging. Here, we demonstrate a readout procedure where the qubit excited state is latched to a metastable charge configuration whose lifetime is tunnel rate limited, persisting here as long as 2.5 ms. Additionally, we show that working in the (4,1)-(3,2) charge configuration enables a latched readout window that is larger and more tunable than typical charge configurations, because the size of the readout window is determined by an orbital splitting rather than a valley splitting.
