Quantum thermodynamics of coronal heating

TL;DR

This paper proposes a quantum thermodynamic model explaining coronal heating through plasma wave generation by convection, involving superradiance and sonic booms, with implications for understanding solar atmospheric phenomena.

Contribution

It introduces a quantum Markovian master equation approach to model plasma wave generation and energy transfer in the solar atmosphere, linking quantum thermodynamics to astrophysical processes.

Findings

Convection generates plasma waves via a process similar to superradiance.

Megahertz Alfven waves carry energy that heats the corona.

The mechanism explains observed power flux and impulsive heating in the Sun.

Abstract

Using the quantum Markovian master equation, we show that convection in the stellar photosphere generates plasma waves by an irreversible process akin to Zeldovich superradiance and sonic booms. In the Sun, this mechanism is most efficient in quiet regions with small magnetic fields. Energy is mostly carried by megahertz Alfven waves that scatter elastically until they reach a height at which they can dissipate via mode conversion. This gives the right power flux for coronal heating and may account for chromospheric evaporation leading to impulsive heat transport in the corona.