Enhanced Electro-optic Sampling with Quantum Probes

@article{Virally2021EnhancedES,
  title={Enhanced Electro-optic Sampling with Quantum Probes},
  author={St{\'e}phane Virally and Patrick Cusson and Denis V Seletskiy},
  journal={Physical Review Letters},
  year={2021}
}
Employing electro-optic sampling (EOS) with ultrashort probe pulses, recent experiments showed direct measurements of quantum vacuum fields and their correlations on subcycle timescales. Here, we propose a quantum-enhanced EOS where photon-number entangled twin beams are used to derive conditioned non-classical probes. In the case of the quantum vacuum, this leads to a six-fold improvement in the signal-to-noise ratio over the classically-probed EOS. In addition, engineering of the conditioning… 
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