Fieldoscopy at the Quantum Limit
Quantum Physics
2025-04-18 v1 Optics
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.
Cite
@article{arxiv.2504.13121,
title = {Fieldoscopy at the Quantum Limit},
author = {Dmitry A. Zimin and Arjun Ashoka and Florentin Reiter and Akshay Rao},
journal= {arXiv preprint arXiv:2504.13121},
year = {2025}
}