Liao Kai-Yu, Liang Zhen-Tao, Liang Jie, Huang Wei, Du Yan-Xiong
Opt Express. 2019 Oct 14;27(21):29639-29648. doi: 10.1364/OE.27.029639.
Realization of the highly efficient hybrid atom-photon gates is vital to the quantum interface that integrates atoms and superconducting resonators. Here we propose a scheme to realize the hybrid state transfer and controlled-PHASE gate based on Raman chirped shortcut to adiabatic passage. The scheme is fast to protect the quantum state from the decoherence effects in the hybrid interface, as well as is robust due to the geometric phase. We show that this two-qubit gate is more resilient than the Raman pulse and Raman chirped adiabatic passage against the variations in the vacuum coupling strength and two-photon detuning. Its fast and robust features make it especially suitable for long-term storage and optical readout of superconducting qubits, and moreover, entanglement swapping between two disparate components.
实现高效的混合原子-光子门对于集成原子和超导谐振器的量子接口至关重要。在此,我们提出一种基于拉曼啁啾绝热捷径来实现混合态转移和受控相位门的方案。该方案速度快,可保护量子态免受混合接口中退相干效应的影响,并且由于几何相位而具有鲁棒性。我们表明,与拉曼脉冲和拉曼啁啾绝热通道相比,这种双量子比特门在真空耦合强度和双光子失谐变化时更具弹性。其快速且鲁棒的特性使其特别适用于超导量子比特的长期存储和光学读出,此外,还适用于两个不同组件之间的纠缠交换。