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arXiv 2202.04205quant-phphysics.optics
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自发发射寿命分辨和鉴别的量子极限

Quantum limits to resolution and discrimination of spontaneous emission lifetimes

Cheyenne S. Mitchell, Mikael P. Backlund

摘要:

在这项工作中,我们调查的量子信息的理论限制,寿命估计和歧视的二能级自发光发射相关的几个任务。我们特别关注的模型问题,解决两个相互不相干的指数衰减高度重叠的时间概率分布。最近的量子激发的超分辨率点发射器的工作,我们发现,直接寿命测量遭受类似的“瑞利的诅咒”时,两个衰减通道的时间常数接近对方。我们提出了替代测量方案,规避这一限制,并证明了优越性,直接测量相关的二元假设检验。我们的研究结果增加了越来越多的例子,其中量子分析揭示了光分子计量学中某些任务的显着信息增益,这些任务不依赖于多光子干涉,但显然确实受益于更彻底地利用单光子的相干性。

英文摘要:

In this work we investigate the quantum information theoretical limits to several tasks related to lifetime estimation and discrimination of a two-level spontaneous optical emitter. We focus in particular on the model problem of resolving two mutually incoherent exponential decays with highly overlapping temporal probability profiles. Mirroring recent work on quantum-inspired super-resolution of point emitters, we find that direct lifetime measurement suffers from an analogue of "Rayleigh's Curse" when the time constants of the two decay channels approach one another. We propose alternative measurement schemes that circumvent this limit, and also demonstrate superiority to direct measurement for a related binary hypothesis test. Our findings add to a growing list of examples in which a quantum analysis uncovers significant information gains for certain tasks in opto-molecular metrology that do not rely on multiphoton interference, but evidently do benefit from a more thorough exploitation of the coherence properties of single photons.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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