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5 March 2021 Photonic quantum technologies for quantum sensing: from quantum absorption measurement to quantum state estimation
Ryo Okamoto
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Proceedings Volume 11700, Optical and Quantum Sensing and Precision Metrology; 1170019 (2021) https://doi.org/10.1117/12.2586519
Event: SPIE OPTO, 2021, Online Only
Abstract
Quantum sensing using photons has attracted attention in recent years. In this talk, we report our two recent works on photonic quantum technologies for quantum sensing. First, we report a loss-tolerant quantum absorption measurement using quantum destructive interference in a nonlinear interferometer. Our theoretical results show that our approach surpasses the conventional quantum scheme under photon loss at the detection stage. Second, we report an adaptive quantum state estimation (AQSE) with which we can estimate an unknown quantum state with the smallest uncertainty. We show our experimental demonstrations of AQSE using photons, including a recently realized novel protocol for quantum states changing in time.
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Ryo Okamoto "Photonic quantum technologies for quantum sensing: from quantum absorption measurement to quantum state estimation", Proc. SPIE 11700, Optical and Quantum Sensing and Precision Metrology, 1170019 (5 March 2021); https://doi.org/10.1117/12.2586519
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KEYWORDS
Absorption
Photons
Polarization
Destructive interference
Interferometers
Precision measurement
Quantum communications
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