论文标题
多种量子假设的纠缠增强测试
Entanglement-enhanced testing of multiple quantum hypotheses
论文作者
论文摘要
对于两个状态或两个通道的二元歧视，量子假设检验已大大提高。在这种情况下，我们已经知道可以使用量子纠缠来增强两个骨气通道的歧视。在这里，我们消除了二进制假设的限制，并表明纠缠的光子可以显着提高多个骨通道的歧视。更确切地说，我们制定了一个通道位置的一般问题，以查找目标是确定目标通道在许多背景通道中的位置的位置。我们证明，在输入和有条件的nulling接收器上使用纠缠的光子在输出中使用，我们可以表现优于任何经典策略。我们的结果可以应用于增强一系列技术任务，包括稀疏经典数据的光学读数，频谱的光谱分析以及确定目标在固定范围内的方向。
Quantum hypothesis testing has been greatly advanced for the binary discrimination of two states, or two channels. In this setting, we already know that quantum entanglement can be used to enhance the discrimination of two bosonic channels. Here, we remove the restriction of binary hypotheses and show that entangled photons can remarkably boost the discrimination of multiple bosonic channels. More precisely, we formulate a general problem of channel-position finding where the goal is to determine the position of a target channel among many background channels. We prove that, using entangled photons at the input and a generalized form of conditional nulling receiver at the output, we may outperform any classical strategy. Our results can be applied to enhance a range of technological tasks, including the optical readout of sparse classical data, the spectroscopic analysis of a frequency spectrum, and the determination of the direction of a target at fixed range.
