# Controlling inversion and time-reversal symmetries by subcycle pulses in the one-dimensional extended Hubbard model

**Authors:** Kazuya Shinjo, Shigetoshi Sota, Seiji Yunoki, Takami Tohyama  
**arXiv:** [2211.08694](https://arxiv.org/abs/2211.08694)  
**Date:** 2022-11-16  
**Summary page:** https://www.summarizepaper.com/en/paper/2211.08694v2/

## Key points

- Study explores impact of subcycle laser pulses on electronic states in strongly correlated electron systems
- Ultrashort subcycle pulses can effectively manipulate inversion and time-reversal symmetries in the one-dimensional extended Hubbard model
- Researchers induce steady electric current or electric polarization through introduction of Aharonov-Bohm flux via phase of electric field
- Symmetry breakings can be monitored using second harmonic generation techniques
- Precise control over laser pulse parameters can influence fundamental symmetries in complex electron systems, paving the way for advancements in quantum materials research

## Summary

In their study titled "Controlling inversion and time-reversal symmetries by subcycle pulses in the one-dimensional extended Hubbard model," authors Kazuya Shinjo, Shigetoshi Sota, Seiji Yunoki, and Takami Tohyama explore the impact of subcycle laser pulses on electronic states in strongly correlated electron systems. Traditional multicycle pulses have advanced our understanding of these systems but fall short in controlling crucial symmetry for novel quantum phases. The researchers demonstrate that ultrashort subcycle pulses can effectively manipulate inversion and time-reversal symmetries in the electronic states of the one-dimensional extended Hubbard model. By utilizing these pulses, they induce a steady electric current (SEC) or electric polarization through the instantaneous introduction of an Aharonov-Bohm flux via the phase of an electric field. Both symmetry breakings can be monitored using second harmonic generation techniques. This study published in Phys. Rev. B 107, 195103 (2023) sheds light on how precise control over laser pulse parameters can influence fundamental symmetries in complex electron systems and pave the way for advancements in quantum materials research through subcycle-pulse engineering.