论文标题
带有梯子发射器的光子Qubits上的可调量子逻辑门
Tunable quantum logic gate on photonic qubits with a ladder emitter
论文作者
论文摘要
我们提出了一个方案，以在频率基础上编码的光子量子位上实现被动和确定性控制的相位门。我们的门采用地面采用级联系统，以与给定极化的控制光子相互作用，并首先与正交极化的目标光子相互作用。通过控制目标光子与级联发射器的第一和第二激发态之间的过渡频率之间的相对失沟，我们可以启用从0到$π$的任何受控的相位操作。该栅极不利用任何主动控制，只需要一个级联发射器，可以使量子电路的低脚印和更有效的分解，尤其是源自量子傅立叶变换的电路。
We present a scheme to implement a passive and deterministic controlled-variable phase gate on photonic qubits encoded in the frequency basis. Our gate employs a cascade system with the ground to first excited state interacting with the control photon of a given polarization, and the first to second excited state transition interacting with the target photon of the orthogonal polarization. By controlling the relative detuning between the target photon and the frequency of the transition between the first and second excited states of the cascade emitter, we enable any controlled-phase operation from 0 to $π$. This gate does not utilize any active control and needs only a single cascade emitter, enabling low-footprint and more efficient decomposition of quantum circuits, especially those rooted in the quantum Fourier transform.
