Observation of spontaneous quantum fluctuations in photon absorption by atoms

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Abstract

Fluctuations in light absorption by atoms are observed by applying laser light on rubidium atoms and measuring the transmitted light intensity fluctuations. These fluctuations are spontaneous noise, generic to photon atom interactions. By making use of the sub-shot noise random signal detection technology, we have measured the spectra at sub-shot noise levels to reveal their rich nature, whose whole structure had previously been unobserved. The effects of atoms transiting the laser beam, Rabi flopping in the optical transitions and Larmor precession of the magnetic moment are observed in the spectra. The properties of the fluctuations reflect not only the quantum behavior of atoms but also that of light.

Original languageEnglish
Article number213
JournalEuropean Physical Journal D
Volume67
Issue number10
DOIs
Publication statusPublished - 2013

Fingerprint

photons
atoms
shot noise
Larmor precession
random signals
signal detection
rubidium
electromagnetic absorption
precession
optical transition
luminous intensity
magnetic moments
laser beams
lasers
interactions

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

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title = "Observation of spontaneous quantum fluctuations in photon absorption by atoms",
abstract = "Fluctuations in light absorption by atoms are observed by applying laser light on rubidium atoms and measuring the transmitted light intensity fluctuations. These fluctuations are spontaneous noise, generic to photon atom interactions. By making use of the sub-shot noise random signal detection technology, we have measured the spectra at sub-shot noise levels to reveal their rich nature, whose whole structure had previously been unobserved. The effects of atoms transiting the laser beam, Rabi flopping in the optical transitions and Larmor precession of the magnetic moment are observed in the spectra. The properties of the fluctuations reflect not only the quantum behavior of atoms but also that of light.",
author = "Takahisa Mitsui and Kenichiro Aoki",
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AU - Aoki, Kenichiro

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AB - Fluctuations in light absorption by atoms are observed by applying laser light on rubidium atoms and measuring the transmitted light intensity fluctuations. These fluctuations are spontaneous noise, generic to photon atom interactions. By making use of the sub-shot noise random signal detection technology, we have measured the spectra at sub-shot noise levels to reveal their rich nature, whose whole structure had previously been unobserved. The effects of atoms transiting the laser beam, Rabi flopping in the optical transitions and Larmor precession of the magnetic moment are observed in the spectra. The properties of the fluctuations reflect not only the quantum behavior of atoms but also that of light.

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