论文标题
$λ$ -Type Atom-Photon混合系统的精制量子门
Refined quantum gates for $Λ$-type atom-photon hybrid systems
论文作者
论文摘要
高效率量子信息处理等于最少的量子资源和最简单的操作，借助逻辑量子门。基于单个光子与三级$λ$ typle arom-cavity系统相互作用的反射几何形状，我们提出了一些用于实现混合系统上的可控的协议（CNOT），弗雷德金和toffoli gates。我们大门的第一个控制量子标码是在飞行光子上编码的，其余量子位在光学腔中的原子上编码。此外，这些量子门可以扩展到具有无辅助光子或原子的O（n）光学元件的多量子CNOT，FREDKIN和TOFFOLI门的最佳合成。此外，最简单的单量操作仅适用于光子，这使得这些逻辑门通过当前技术实验可行。
High-efficiency quantum information processing is equivalent to the fewest quantum resources and the simplest operations by means of logic qubit gates. Based on the reflection geometry of a single photon interacting with a three-level $Λ$-typle atom-cavity system, we present some refined protocols for realizing controlled-not (CNOT), Fredkin, and Toffoli gates on hybrid systems. The first control qubit of our gates is encoded on a flying photon, and the rest qubits are encoded on the atoms in optical cavity. Moreover, these quantum gates can be extended to the optimal synthesis of multi-qubit CNOT, Fredkin and Toffoli gates with O(n) optical elements without auxiliary photons or atoms. Further, the simplest single-qubit operations are applied to the photon only, which make these logic gates experimentally feasible with current technology.
