论文标题
近期量子光子设备上的误差缓解
Error mitigation on a near-term quantum photonic device
论文作者
论文摘要
光子损失对量子光子设备的性能具有破坏性，因此抑制光子损失的影响对于光子量子技术至关重要。我们提出了两种方案，以减轻高斯玻色子采样装置的光子损失的影响，以提高采样概率的估计。我们的方案不使用少量的硬件修改，甚至不使用修改，而不是使用其硬件资源开销而昂贵的错误校正代码。一旦获得测量数据，我们的损失抑制技术依赖于收集其他测量数据或经典后处理。我们表明，由于经典后加工的中等成本，对于一定程度的损失，光子损失的影响可以大大抑制。因此，所提出的方案是近期光子量子设备应用的关键推动因素。
Photon loss is destructive to the performance of quantum photonic devices and therefore suppressing the effects of photon loss is paramount to photonic quantum technologies. We present two schemes to mitigate the effects of photon loss for a Gaussian Boson Sampling device, in particular, to improve the estimation of the sampling probabilities. Instead of using error correction codes which are expensive in terms of their hardware resource overhead, our schemes require only a small amount of hardware modifications or even no modification. Our loss-suppression techniques rely either on collecting additional measurement data or on classical post-processing once the measurement data is obtained. We show that with a moderate cost of classical post processing, the effects of photon loss can be significantly suppressed for a certain amount of loss. The proposed schemes are thus a key enabler for applications of near-term photonic quantum devices.
