双轨编码与超导空腔的双轨编码
James D Teoh1,2,3, Patrick Winkel1,2,3, Harshvardhan K Babla1,2,3
1Department of Applied Physics, Yale University, New Haven, CT 06511.
概括
我们开发了一种新的量子硬件设计,电路-量子电动力学 (QED) 双轨量子位,以减少量子计算中的错误. 这种设计将错误转换为可纠正的删除错误,为实际的量子错误纠正铺平了道路.
科学领域:
- 量子计算是一种量子计算.
- 量子错误纠正方法 量子错误纠正方法
- 超导电路中的超导电路
背景情况:
- 量子错误校正 (QEC) 对于可靠的量子计算至关重要.
- 减少和减轻量子硬件中的错误对于推进QEC至关重要.
- 现有的量子硬件面临着像光子损失这样的主导错误源的挑战.
研究的目的:
- 为了引入一种新的量子硬件设计,电路-量子电动力学 (QED) 双轨量子比特.
- 展示一种将占主导地位的光子损失错误转换为可纠正的删除错误的方法.
- 为了实现通用量子操作,使用基于门的方法,最小的辅助开销.
主要方法:
- 在两个超导微波腔的单光子子空间中编码物理量子位.
- 使用一个传唤辅助器进行门操作,状态准备和读出.
- 实施错误检测和转换机制,将硬件错误转化为删除错误.
主要成果:
- 电路QED双轨量子位有效地将光子损失错误转换为删除错误.
- 一组基于门的通用量子运算 (状态准备,读取,单/双量子比特门) 可以通过每个量子比特实现一个跨子 ancilla.
- 一级硬件错误被转换为删除错误,留下显著较小的背景保利错误.
结论:
- 双轨腔量子比特显示出一个有利的错误率层次结构.
- 这种量子比特设计预计将在当前连贯时间下有效地表现在相关QEC值以下.
- 拟议的电路-QED实现为QEC提供了与线性光学方法相比的独特优势.
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