Mixed gauge in strong laser-matter interaction

Abstract

We show that the description of laser-matter interaction in length gauge at short short and in velocity gauge at longer distances allows for compact physical modeling in terms of field free states, rapidly convergent numerical approximation, and efficient absorption of outgoing flux. The mathematical and numerical framework for using mixed gauge in practice is introduced. We calculate photoelectron spectra generated by a laser field at wavelengths of 400$\sim$800 nm from single-electron systems and from the helium atom and hydrogen molecule. We assess the accuracy of coupled channels calculations by comparison to full two-electron solutions of the time-dependent Schrodinger equation and find substantial advantages of mixed over velocity and length gauges.

References in corpus (6)

• Strong-field approximation for intense-laser atom processes: the choice of gauge
• Exterior complex scaling as a perfect absorber in time-dependent problems
• One-Electron Ionization of Multielectron Systems in Strong Nonresonant Laser Fields
• t-SURFF: Fully Differential Two-Electron Photo-Emission Spectra
• Atoms and Molecules in Intense Laser Fields: Gauge Invariance of Theory and Models
• Generalized gauge-invariant formulations of the strong-field approximation

Cited by in corpus (5)

• A first principles TDDFT framework for spin and time-resolved ARPES in periodic systems
• Double photo-electron momentum spectra of Helium at infrared wavelength
• Electron double-emission spectra for Helium atoms in intense 400 nm laser pulses
• A quantum simulation of dissociative ionization of $H_2^{+}$ in full dimensionality with time dependent surface flux method
• Single-photon and multi-photon Fano lines for helium and neon using tRecX-haCC