The quantum statistics of entangled photon pairs promise greater performance for absorption measurements than can be achieved classically. However, the performance of a quantum approach is easily degraded under a loss of photons caused by experimental limitations. Here, we propose a loss-tolerant quantum scheme using quantum destructive interference in a nonlinear interferometer. Our theoretical results show that the loss-tolerant quantum scheme surpasses the conventional quantum scheme under photon loss at the detection stage. We demonstrate how photon losses at optical paths and mode-mismatches in a nonlinear interferometer affect the performance of our scheme. We also propose a hybrid approach to cope with the case where the quantum destructive interference is imperfect, and show that the hybrid scheme always surpasses the conventional quantum scheme.

中文翻译：

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耐损耗量子吸收测量

纠缠光子对的量子统计数据比经典的方法具有更高的吸收测量性能。但是，由于实验的局限性，在光子损失下，量子方法的性能容易降低。在这里，我们提出了一种在非线性干涉仪中使用量子相消干涉的容错量子方案。我们的理论结果表明，在检测阶段，在光子损耗下，容错量子方案优于常规量子方案。我们演示了非线性干涉仪中光路处的光子损耗和模式不匹配如何影响我们方案的性能。我们还提出了一种混合方法来应对量子破坏性干涉不完美的情况，