Thermal wave packets induced by attosecond laser pulses

TL;DR

This paper investigates how attosecond laser pulses generate non-dispersive thermal wave packets, called heatons, described by a modified Klein-Gordon equation, revealing their behavior under different pulse durations.

Contribution

It introduces a modified Klein-Gordon equation to model heaton dynamics induced by attosecond laser pulses, highlighting their nondispersive nature at ultrashort durations.

Findings

Heatons are nondispersive for attosecond pulses.

Heatons are damped with relaxation-time-scale damping for longer pulses.

The modified Klein-Gordon equation effectively describes thermal wave propagation.

Abstract

In this paper the dynamics of the interaction of attosecond laser pulses with matter is investigated. It will be shown that the master equation: modified Klein-Gordon equation describes the propagation of the heatons. Heatons are the thermal wave packets. When the duration of the laser pulsees \delta t is of the order of attosecond the heaton-thermal wave packets are nondispersive objects. For \delta t \to \infty, the heatons are damped with damping factor of the order of relaxation time for thermal processes. Key words: Temperature fields; Attosecond laser pulses; Heatons; Modified Klein-Gordon equation.