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arXiv · 2504.13121

Fieldoscopy at the Quantum Limit

Dmitry A. Zimin·Arjun Ashoka·Florentin Reiter·Akshay Rao
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Abstract

We demonstrate a novel concept for measuring time-varying electric field transients of petahertz-scale photons down to a single-photon regime. We observe a clear transition from classical to quantum nature of light that agrees with our Monte Carlo model. We reach unprecedented yoctojoule-level sensitivity and a dynamic range exceeding 90 decibels. We utilize this capability to measure time-dependent intrapulse light coherence - a regime inaccessible to conventional, time-averaged spectroscopy. This opens new avenues for quantum information, cryptography, and quantum light-matter interactions on sub-cycle time scales with attosecond precision.

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Dmitry A. Zimin, Arjun Ashoka, Florentin Reiter, Akshay Rao. 2025-04-17. Fieldoscopy at the Quantum Limit. https://arxiv.org/abs/2504.13121

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