在量子计算机上实现投影量子自溶器的实现.
Jonathon P Misiewicz1, Francesco A Evangelista1
1Department of Chemistry and Cherry Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States.
The journal of physical chemistry. A
|March 7, 2024
概括
我们在量子计算机上测试了投影量子自溶解器 (PQE),实现了精确的分子能量. 对于当前量子硬件的可靠结果,误差缓解技术至关重要.
科学领域:
- 量子计算是一种量子计算.
- 计算化学是一种计算化学.
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 量子算法对于模拟复杂的量子系统至关重要.
- 短期量子器件遭受噪音和错误,限制了他们的准确性.
- 误差缓解技术对于从杂的量子硬件中提取可靠的结果至关重要.
研究的目的:
- 在IBM量子硬件上评估投影量子自身溶解器 (PQE) 的性能.
- 评估错误减轻技术在提高PQE准确性方面的有效性.
- 调查PQE在解决分子和凝聚物质问题的能力.
主要方法:
- 在IBM量子处理器上实现投影量子自溶解器 (PQE).
- 应用错误缓解技术,包括错误推断,量子比特逐渐缩小和后选择.
- 利用代子空间算法的直接反转来进行参数优化.
主要成果:
- 单量子比特H2模型的精确值在4毫哈特的范围内实现了分子能量.
- 在它的关键点恢复了4位横场Ising模型的99%的相关性能量.
- 确定了随机噪声和设备不一致性作为准确性的关键限制.
结论:
- PQE证明了在现有硬件上进行精确量子模拟的潜力,并可减轻错误.
- 优化算法可以快速融合,但噪音需要仔细处理参数更新.
- 建议进行误差推断和量子位逐渐缩小,以提高PQE实验可靠性.
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