Quantum-enhanced velocimetry with Doppler-broadened atomic vapor
Traditionally, measuring the center-of-mass (c.m.) velocity of an atomic ensemble relies on measuring the Doppler shift of the absorption spectrum of single atoms in the ensemble. Mapping out the velocity distribution of the ensemble is indispensable when determining the c.m. velocity using this tec...
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sg-ntu-dr.10356-1450242023-02-28T19:54:12Z Quantum-enhanced velocimetry with Doppler-broadened atomic vapor Chen, Zilong Lim, Hong Ming Huang, Chang Dumke, Rainer Lan, Shau-Yu School of Physical and Mathematical Sciences Physics - Atomic Physics Physics - Atomic Physics Quantum Physics Science::Physics Quantum-enhanced Doppler-broadened Traditionally, measuring the center-of-mass (c.m.) velocity of an atomic ensemble relies on measuring the Doppler shift of the absorption spectrum of single atoms in the ensemble. Mapping out the velocity distribution of the ensemble is indispensable when determining the c.m. velocity using this technique. As a result, highly sensitive measurements require preparation of an ensemble with a narrow Doppler width. Here, we use a dispersive measurement of light passing through a moving room temperature atomic vapor cell to determine the velocity of the cell in a single shot with a short-term sensitivity of 5.5 μm s^{-1} Hz^{-1/2}. The dispersion of the medium is enhanced by creating quantum interference through an auxiliary transition for the probe light under electromagnetically induced transparency condition. In contrast to measurement of single atoms, this method is based on the collective motion of atoms and can sense the c.m. velocity of an ensemble without knowing its velocity distribution. Our results improve the previous measurements by 3 orders of magnitude and can be used to design a compact motional sensor based on thermal atoms. Ministry of Education (MOE) National Research Foundation (NRF) Published version We thank Kuan Hong Tan for assistance in the early stage of the experiment. This work is supported by Singapore National Research Foundation under Grant No. NRFF2013-12, Nanyang Technological University under startup grants, and Singapore Ministry of Education under Grant No. MOE2017-T2-2-066. 2020-12-08T09:19:17Z 2020-12-08T09:19:17Z 2020 Journal Article Chen, Z., Lim, H. M., Huang, C., Dumke, R., & Lan, S.-Y. (2020). Quantum-enhanced velocimetry with Doppler-broadened atomic vapor. Physical Review Letters, 124(9), 093202-. doi:10.1103/PhysRevLett.124.093202 0031-9007 https://hdl.handle.net/10356/145024 10.1103/PhysRevLett.124.093202 32202858 9 124 en NRFF2013-12 MOE2017-T2-2-066 Physical Review Letters © 2020 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society. application/pdf |
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Physics - Atomic Physics Physics - Atomic Physics Quantum Physics Science::Physics Quantum-enhanced Doppler-broadened Chen, Zilong Lim, Hong Ming Huang, Chang Dumke, Rainer Lan, Shau-Yu Quantum-enhanced velocimetry with Doppler-broadened atomic vapor |
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Traditionally, measuring the center-of-mass (c.m.) velocity of an atomic ensemble relies on measuring the Doppler shift of the absorption spectrum of single atoms in the ensemble. Mapping out the velocity distribution of the ensemble is indispensable when determining the c.m. velocity using this technique. As a result, highly sensitive measurements require preparation of an ensemble with a narrow Doppler width. Here, we use a dispersive measurement of light passing through a moving room temperature atomic vapor cell to determine the velocity of the cell in a single shot with a short-term sensitivity of 5.5 μm s^{-1} Hz^{-1/2}. The dispersion of the medium is enhanced by creating quantum interference through an auxiliary transition for the probe light under electromagnetically induced transparency condition. In contrast to measurement of single atoms, this method is based on the collective motion of atoms and can sense the c.m. velocity of an ensemble without knowing its velocity distribution. Our results improve the previous measurements by 3 orders of magnitude and can be used to design a compact motional sensor based on thermal atoms. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Chen, Zilong Lim, Hong Ming Huang, Chang Dumke, Rainer Lan, Shau-Yu |
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Article |
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Chen, Zilong Lim, Hong Ming Huang, Chang Dumke, Rainer Lan, Shau-Yu |
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Chen, Zilong |
title |
Quantum-enhanced velocimetry with Doppler-broadened atomic vapor |
title_short |
Quantum-enhanced velocimetry with Doppler-broadened atomic vapor |
title_full |
Quantum-enhanced velocimetry with Doppler-broadened atomic vapor |
title_fullStr |
Quantum-enhanced velocimetry with Doppler-broadened atomic vapor |
title_full_unstemmed |
Quantum-enhanced velocimetry with Doppler-broadened atomic vapor |
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quantum-enhanced velocimetry with doppler-broadened atomic vapor |
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2020 |
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https://hdl.handle.net/10356/145024 |
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