# High harmonic imaging of ultrafast many-body dynamics in strongly correlated systems

## TL;DR

This paper demonstrates that high harmonic generation can be used to ultrafastly resolve many-body dynamics in strongly correlated systems, enabling femtosecond-scale insights into optically driven phase transitions.

## Contribution

It introduces a novel method combining high harmonic generation with the study of many-body dynamics in strongly correlated materials, achieving unprecedented temporal resolution.

## Key findings

- High harmonic generation can track ultrafast many-body dynamics.
- Femtosecond accuracy in resolving phase transitions.
- Potential for new time-resolved studies in correlated systems.

## Abstract

This Letter brings together two topics that, until now, have been the focus of intense but non-overlapping research efforts. The first concerns high harmonic generation in solids, which occurs when intense light field excites highly non-equilibrium electronic response in a semiconductor or a dielectric. The second concerns many-body dynamics in strongly correlated systems such as the Mott insulator. Here we show that high harmonic generation can be used to time-resolve ultrafast many-body dynamics associated with optically driven phase transition, with accuracy far exceeding one cycle of the driving light field. Our work paves the way for time-resolving highly non-equilibrium many body dynamics in strongly correlated systems, with few femtosecond accuracy.