22 May 2006 Copying of quantum information by means of a quantum amplifier
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Information aspects of copying quantum states via stimulated emission of an optical quantum amplifier are considered. It is shown that the measurable information very rapidly decreases after amplification of a single photon up to a level of several photons. Spontaneous emission, which leads to such behavior, is also discussed.
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Denis V. Sych, Boris A. Grishanin, Victor N. Zadkov, "Copying of quantum information by means of a quantum amplifier", Proc. SPIE 6256, ICONO 2005: Ultrafast Phenomena and Physics of Superintense Laser Fields; Quantum and Atom Optics; Engineering of Quantum Information, 625611 (22 May 2006); doi: 10.1117/12.682634; https://doi.org/10.1117/12.682634

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