Institute for Quantum Electronics, ETH Zürich, Otto-Stern-Weg 1, 8093 Zürich, Switzerland.
Science. 2015 Jan 2;347(6217):53-6. doi: 10.1126/science.1261033. Epub 2014 Dec 18.
The robust generation of quantum states in the presence of decoherence is a primary challenge for explorations of quantum mechanics at larger scales. Using the mechanical motion of a single trapped ion, we utilize reservoir engineering to generate squeezed, coherent, and displaced-squeezed states as steady states in the presence of noise. We verify the created state by generating two-state correlated spin-motion Rabi oscillations, resulting in high-contrast measurements. For both cooling and measurement, we use spin-oscillator couplings that provide transitions between oscillator states in an engineered Fock state basis. Our approach should facilitate studies of entanglement, quantum computation, and open-system quantum simulations in a wide range of physical systems.
在退相干的情况下生成鲁棒的量子态是探索更大尺度量子力学的主要挑战。我们利用单个囚禁离子的机械运动，利用储层工程在噪声存在的情况下生成压缩、相干和位移压缩态作为稳态。我们通过生成两态相关的自旋-运动拉比振荡来验证所产生的状态，从而得到高对比度的测量。对于冷却和测量，我们使用自旋-振荡器耦合，在工程福克态基中提供振荡器态之间的跃迁。我们的方法应该有助于在广泛的物理系统中研究纠缠、量子计算和开放系统量子模拟。
