论文标题
测量三分之三状态的纠结
Measuring the tangle of three-qubit states
论文作者
论文摘要
我们提出了一个量子电路，该电路将未知的三质量状态转化为其规范形式，直至相对相位，并且给定了许多原始状态的副本。该电路由三个单Quit参数化量子门制成，并且以各种方式学习了参数的最佳值。一旦实现了这种转换，在计算基础上直接测量结果概率就可以估算纠缠，从而量化了真正的三方纠缠。我们在不同的噪声条件下对一组随机状态进行模拟，以评估该方法的有效性。
We present a quantum circuit that transforms an unknown three-qubit state into its canonical form, up to relative phases, given many copies of the original state. The circuit is made of three single-qubit parametrized quantum gates, and the optimal values for the parameters are learned in a variational fashion. Once this transformation is achieved, direct measurement of outcome probabilities in the computational basis provides an estimate of the tangle, which quantifies genuine tripartite entanglement. We perform simulations on a set of random states under different noise conditions to asses the validity of the method.
