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Paraxial Theory of Direct Electro-Optic Sampling of the Quantum Vacuum

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2015

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http://arxiv.org/abs/1508.06953

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Direct detection of vacuum fluctuations and analysis of sub-cycle quantum properties of the electric field are explored by a paraxial quantum theory of ultrafast electro-optic sampling. The feasibility of such experiments is demonstrated by realistic calculations adopting a thin ZnTe electro-optic crystal and stable few-femtosecond laser pulses. We show that nonlinear mixing of a short near-infrared probe pulse with multi-terahertz vacuum field modes leads to an increase of the signal variance with respect to the shot noise level. The vacuum contribution increases significantly for appropriate length of the nonlinear crystal, short probe pulse durations, tight focusing, and sufficiently large number of photons per probe pulse. If the vacuum input is squeezed, the signal variance depends on the probe delay. Temporal positions with noise level below the pure vacuum may be traced with a sub-cycle accuracy.

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ISO 690MOSKALENKO, Andrey S., Claudius RIEK, Denis V. SELETSKIY, Guido BURKARD, Alfred LEITENSTORFER, 2015. Paraxial Theory of Direct Electro-Optic Sampling of the Quantum Vacuum
BibTex
@unpublished{Moskalenko2015Parax-32713,
  year={2015},
  title={Paraxial Theory of Direct Electro-Optic Sampling of the Quantum Vacuum},
  author={Moskalenko, Andrey S. and Riek, Claudius and Seletskiy, Denis V. and Burkard, Guido and Leitenstorfer, Alfred}
}
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