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  • OPTICS  (1)
  • Thermodynamics and Statistical Physics  (1)
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  • OPTICS  (1)
  • Thermodynamics and Statistical Physics  (1)
  • 42.50  (1)
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    Quantum amplification and quantum optical tapping with squeezed states and correlated quantum states (1994)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Quantum fluctuations in a nondegenerate optical parametric amplifier (NOPA) are investigated experimentally with a squeezed state coupled into the internal idler mode of the NOPA. Reductions of the inherent quantum noise of the amplifier are observed with a minimum noise level 0.7 dB below the usual noise level of the amplifier with its idler mode in a vacuum state. With two correlated quantum fields as the amplifier's inputs and proper adjustment of the gain of the amplifier, it is shown that the amplifier's intrinsic quantum noise can be completely suppressed so that noise-free amplification is achieved. It is also shown that the NOPA, when coupled to either a squeezed state or a nonclassically correlated state, can realize quantum tapping of optical information.
    Keywords: OPTICS
    Type: NASA. Goddard Space Flight Center, Third International Workshop on Squeezed States and Uncertainty Relations; p 465-474
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Quantum Probability Cancellation Due to a Single-Photon State (1996)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: When an N-photon state enters a lossless symmetric beamsplitter from one input port, the photon distribution for the two output ports has the form of Bernouli Binormial, with highest probability at equal partition (N/2 at one outport and N/2 at the other). However, injection of a single photon state at the other input port can dramatically change the photon distribution at the outputs, resulting in zero probability at equal partition. Such a strong deviation from classical particle theory stems from quantum probability amplitude cancellation. The effect persists even if the N-photon state is replaced by an arbitrary state of light. A special case is the coherent state which corresponds to homodyne detection of a single photon state and can lead to the measurement of the wave function of a single photon state.
    Keywords: Thermodynamics and Statistical Physics
    Type: Fourth International Conference on Squeezed States and Uncertainty Relations; 479-487; NASA-CP-3322
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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