论文标题
通过操作准稳定性方法在Si量子点系统中探索纠缠资源
Exploring entanglement resource in Si quantum dot systems with operational quasiprobability approach
论文作者
论文摘要
我们表征了对充电噪声敏感的现实两数分信号的量子纠缠。我们的工作示例是从硅双重量子点（DQD）平台产生的时间响应，其中单量旋转和两个Quibent的受控操作依次进行，以生成任意纠缠状态。为了表征两个Quibit状态的纠缠，我们采用边缘操作的准能力（OQ）方法，如果给定状态纠缠在一起，则允许概率函数的负值。 While the charge noise, which is omnipresent in semiconductor devices, severely affects logic operations implemented in the DQD platform, causing huge degradation in fidelity of unitary operations as well as resulting two-qubit states, the pattern in the OQ-driven entanglement strength turns out to be quite invariant, indicating that the resource of quantum entanglement is not significantly broken though the physical system is exposed to noise-driven量子点之间交换相互作用的波动。
We characterize the quantum entanglement of the realistic two-qubit signals that are sensitive to charge noises. Our working example is the time response generated from a silicon double quantum dot (DQD) platform, where a single-qubit rotation and a two-qubit controlled-NOT operation are conducted sequentially in time to generate arbitrary entangled states. In order to characterize the entanglement of two-qubit states, we employ the marginal operational quasiprobability (OQ) approach that allows negative values of the probability function if a given state is entangled. While the charge noise, which is omnipresent in semiconductor devices, severely affects logic operations implemented in the DQD platform, causing huge degradation in fidelity of unitary operations as well as resulting two-qubit states, the pattern in the OQ-driven entanglement strength turns out to be quite invariant, indicating that the resource of quantum entanglement is not significantly broken though the physical system is exposed to noise-driven fluctuations in exchange interaction between quantum dots.
