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Quantum-enhanced Do...
Quantum-enhanced Doppler lidar
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- Reichert, Maximilian (författare)
- Universidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU)
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- di Candia, Roberto, 1986 (författare)
- Aalto-Yliopisto,Aalto University,Chalmers tekniska högskola,Chalmers University of Technology
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- Win, Moe Z. (författare)
- Massachusetts Institute of Technology (MIT)
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- Sanz, Mikel (författare)
- Universidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU),Basque Foundation for Science (Ikerbasque),Basque Center for Applied Mathematics (BCAM)
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(creator_code:org_t)
- 2022-12-19
- 2022
- Engelska.
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Ingår i: npj Quantum Information. - : Springer Science and Business Media LLC. - 2056-6387. ; 8:1
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- We propose a quantum-enhanced lidar system to estimate a target’s radial velocity, which employs squeezed and frequency-entangled signal and idler beams. We compare its performance against a classical protocol using a coherent state with the same pulse duration and energy, showing that quantum resources provide a precision enhancement in the estimation of the velocity of the object. We identify three distinct parameter regimes characterized by the amount of squeezing and frequency entanglement. In two of them, a quantum advantage exceeding the standard quantum limit is achieved assuming no photon losses. Additionally, we show that an optimal measurement to attain these results in the lossless case is frequency-resolved photon counting. Finally, we consider the effect of photon losses for the high-squeezing regime, which leads to a constant factor quantum advantage higher than 3 dB in the variance of the estimator, given a roundtrip lidar-to-target-to-lidar transmissivity larger than 50%.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
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