Quantum-Optical Spectrometry in Relativistic Laser-Plasma Interactions Using the High-Harmonic Generation Process: A Proposal

TL;DR

This paper proposes applying quantum-optical spectrometry, specifically the quantum spectrometer method, to relativistic laser-plasma interactions to explore quantum electrodynamics phenomena in high-intensity laser fields.

Contribution

It introduces the potential of quantum spectrometry in relativistic regimes, extending its use from non-relativistic to relativistic laser-matter interactions for studying quantum electrodynamics.

Findings

Quantum spectrometry can be applied to relativistic laser-plasma interactions.

The method can reveal quantum optical phenomena in high-intensity laser fields.

It opens new avenues for investigating relativistic quantum electrodynamics.

Abstract

Quantum-optical spectrometry is a recently developed shot-to-shot photon correlation-based method, namely using a quantum spectrometer (QS), that has been used to reveal the quantum optical nature of intense laser-matter interactions and connect the research domains of quantum optics (QO) and strong laser-field physics (SLFP). The method provides the probability of absorbing photons from a driving laser field towards the generation of a strong laser-field interaction product, such as high-order harmonics. In this case, the harmonic spectrum is reflected in the photon number distribution of the infrared (IR) driving field after its interaction with the high harmonic generation medium. The method was implemented in non-relativistic interactions using high harmonics produced by the interaction of strong laser pulses with atoms and semiconductors. Very recently, it was used for the generation of non-classical light states in intense laser-atom interaction, building the basis for studies of quantum electrodynamics in strong laser-field physics and the development of a new class of non-classical light sources for applications in quantum technology. Here, after a brief introduction of the QS method, we will discuss how the QS can be applied in relativistic laser-plasma interactions and become the driving factor for initiating investigations on relativistic quantum electrodynamics.