Photodetector Sensitive to the Vacuum Fluctuations-Quantum Counter-

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  • 真空揺らぎに感度を持つ光子検出器―量子カウンター―
  • サイキン ノ ケンキュウ カラ シンクウ ユラギ ニ カンド オ モツ コウシ ケンシュツキ リョウシ カウンター

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Abstract

When the electromagnetic field is detected by stimulated emission, rather than by absorption, antinormally ordered photodetection can be realized. One of the distinct features of this photodetection scheme, i.e., a quantum counter, is its sensitivity to vacuum fluctuations. We have recently succeeded in experimentally demonstrating the quantum counter by exploiting stimulated parametric down-conversion. Here, we present some interesting physics concerning vacuum fluctuations and quantum measurement processes through our experiment on the quantum counter.

Journal

  • Butsuri

    Butsuri 60 (5), 363-367, 2005

    The Physical Society of Japan

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