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arXiv 2209.01430quant-ph
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量子可分性问题的变分方法

A Variational Approach to the Quantum Separability Problem

Mirko Consiglio, Tony John George Apollaro, Marcin Wieśniak

摘要:

提出了变分可分性验证器(VSV),它是一种新的变分量子算法(VQA),用于确定任意量子态关于希尔伯特-施密特距离(HSD)的最近可分态(CSS).我们首先评估的VSV的性能,通过调查的格林伯格-霍恩-蔡林格(GHZ)状态的最多7个量子比特的优化过程的收敛性,使用状态向量和拍摄为基础的模拟。我们还数值计算了最大纠缠多体$X$ -态($X$ -MEMS)的(CSS),并利用该算法的结果来验证上述(CSS)的解析形式.我们的研究结果表明,目前嘈杂的中间尺度量子(NISQ)设备可能是有用的,在解决$NP$硬完全分离性问题,使用VSV,由于浅量子线路施加的破坏性SWAP测试来评估(HSD)。如果对算法进行改进,得到多体纠缠态的最接近的$k$ -可分态($k$ -CSS),则(VSV)也可能导致多体量子态的表征.

英文摘要:

We present the variational separability verifier (VSV), which is a novel variational quantum algorithm (VQA) that determines the closest separable state (CSS) of an arbitrary quantum state with respect to the Hilbert-Schmidt distance (HSD). We first assess the performance of the VSV by investigating the convergence of the optimization procedure for Greenberger-Horne-Zeilinger (GHZ) states of up to seven qubits, using both statevector and shot-based simulations. We also numerically determine the (CSS) of maximally entangled multipartite $X$-states ($X$-MEMS), and subsequently use the results of the algorithm to surmise the analytical form of the aforementioned (CSS). Our results indicate that current noisy intermediate-scale quantum (NISQ) devices may be useful in addressing the $NP$-hard full separability problem using the VSV, due to the shallow quantum circuit imposed by employing the destructive SWAP test to evaluate the (HSD). The (VSV) may also possibly lead to the characterization of multipartite quantum states, once the algorithm is adapted and improved to obtain the closest $k$-separable state ($k$-CSS) of a multipartite entangled state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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