一种用于囚禁离子量子计算机的简化 Mølmer-Sørensen 门
A simplified Mølmer-Sørensen gate for the trapped ion quantum computer
AI总结：
本文提出一种简化的 Mølmer-Sørensen 门，用单色光场替代双色光场实现贝尔态转换，执行时间相当但更抗热涨落，优于原始 MS 门。
摘要：
我们讨论了如何简化用于囚禁离子量子计算机的 Mølmer-Sørensen（MS）门。原始的 MS 门是通过同时用双色相干光场分别照射两个离子来实现的。在本文中，我们提出了一种方法，通过分别用单色相干光场照射两个离子，将两个离子的可分离态转换为贝尔态之一，这一点是我们方案相对于原始 MS 门的优势。我们提出的门的执行时间长度与原始 MS 门相当，然而，数值计算表明，我们提出的门对声子的热涨落敏感性较弱。通过给出另一个简单的双离子门示例，该门能够产生纠缠但对热涨落非常脆弱，我们表明我们简化的 MS 门比通常的门更为突出。
英文摘要：
We discuss how to simplify the Molmer-Sorensen (MS) gate which is used for the trapped ion quantum computer. The original MS gate is implemented by illuminating two ions with bichromatic coherent light fields separately at the same time. In this paper, we propose a method for transforming a separable state of two ions into one of the Bell states by illuminating the two ions with monochromatic coherent light fields individually and this point is the advantage of our scheme over the original MS gate. The length of the execution time of our proposed gate is comparable to that of the original MS gate, however, numerical calculations show that our proposed gate is weakly sensitive to thermal fluctuations of the phonons. By giving another example of a simple two-ion gate that can generate entanglement but is strongly vulnerable to thermal fluctuations, we show that our simplified MS gate is more marked than usual.
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