在超导量子电路中生成福克状态
Max Hofheinz1, E M Weig, M Ansmann
1Department of Physics, University of California, Santa Barbara, California 93106, USA.
Nature
|July 18, 2008
概括
研究人员在固态系统中展示了多光子福克状态的受控生成. 量子力学的这一突破使得使用超导量子比特在波器中精确控制量子状态成为可能.
科学领域:
- 量子力学就是量子力学.
- 固态物理 固态物理
- 量子光学是一种量子光学.
背景情况:
- 旋转系统和波器是量子力学的基本原型.
- 旋转-1/2系统高度非线性,而波器则是线性的,具有离散的能量水平.
- 在振荡器中创建福克状态具有挑战性,阻碍了对量子行为的观察.
研究的目的:
- 在固态系统中演示多光子福克状态的受控生成.
- 使用超导量子比特与微波共振器相连,用于状态准备和分析.
- 为了对比生成的福克状态与经典的连贯状态.
主要方法:
- 采用超导相位量子位作为一个双层系统.
- 将量子位连接到微波共振器,作为一个波振荡器.
- 使用经典脉冲来准备和分析福克和连贯状态的状态.
主要成果:
- 成功地准备和分析了最多六个光子的纯福克状态.
- 在固态波器中证明了对量子状态的受控生成.
- 从通过直接共振器激发产生的经典连贯状态中区分出不同的福克状态.
结论:
- 该研究提供了一种在固态系统中控制生成福克状态的方法.
- 这为探索和振荡器中的量子现象开辟了道路.
- 该技术为量子信息处理和模拟提供了一个平台.
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