论文标题
通过变异量子电路优化抵绝热性
Optimizing Counterdiabaticity by Variational Quantum Circuits
论文作者
论文摘要
在数字化的绝热进化中，利用抵绝热（CD）驾驶 - 旨在抑制绝热性转变，对量子方案和算法产生了极大的兴趣。但是，用嵌套的换向器ANSATZ改善近似CD术语是一项艰巨的任务。在这项工作中，我们提出了一种使用变异量子电路找到CD项的最佳系数的技术。根据经典的优化例程，该电路的参数被优化以提供与CD项相对应的系数。然后，在最近的邻居Ising模型上的Greenberger-Horne-Zeilinger状态准备中，他们的性能得到了例证。最后，我们还显示了与常规量子近似优化算法的优势，该算法在有界时间的忠诚度方面。
Utilizing counterdiabatic (CD) driving - aiming at suppression of diabatic transition - in digitized adiabatic evolution have garnered immense interest in quantum protocols and algorithms. However, improving the approximate CD terms with a nested commutator ansatz is a challenging task. In this work, we propose a technique of finding optimal coefficients of the CD terms using a variational quantum circuit. By classical optimizations routines, the parameters of this circuit are optimized to provide the coefficients corresponding to the CD terms. Then their improved performance is exemplified in Greenberger-Horne-Zeilinger state preparation on nearest-neighbor Ising model. Finally, we also show the advantage over the usual quantum approximation optimization algorithm, in terms of fidelity with bounded time.
