Action Functional for a Particle with Damping

Condensed Matter

Luca Salasnich¹  Federico de Bettin¹  Alberto Cappellaro¹ 

[1] Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, Via Marzolo 8, 35131 Padova, Italy;

关键词: quantum tunneling;    dissipation;    effective action;   

DOI  :  10.3390/condmat4030081

来源: DOAJ

【 摘 要 】

In this brief report we discuss the action functional of a particle with damping, showing that it can be obtained from the dissipative equation of motion through a modification which makes the new dissipative equation invariant for time reversal symmetry. This action functional is exactly the effective action of Caldeira-Leggett model but, in our approach, it is derived without the assumption that the particle is weakly coupled to a bath of infinite harmonic oscillators.

【 授权许可】

Unknown