| TISE | Time-independent Schrödinger equation |
| TDSE | Time-dependent Schrödinger equation |
| KH | Kramers-Henneberger |
| SFA | Strong-field approximation |
| FTI | Frustrated tunneling ionization |
| ATI | Above-threshold ionization |
| HHG | High-harmonic generation |
| TDUT | Time-dependent unitary transformation |
| FWHM | Full width at half maximum |
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