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Action Functional for a Particle with Damping

1
Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, Via Marzolo 8, 35131 Padova, Italy
2
Istituto Nazionale di Ottica (INO) del Consiglio Nazionale delle Ricerche (CNR), Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy
*
Author to whom correspondence should be addressed.
Condens. Matter 2019, 4(3), 81; https://doi.org/10.3390/condmat4030081
Received: 23 August 2019 / Revised: 6 September 2019 / Accepted: 6 September 2019 / Published: 10 September 2019
(This article belongs to the Special Issue Many Body Quantum Chaos)
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. View Full-Text
Keywords: quantum tunneling; dissipation; effective action quantum tunneling; dissipation; effective action
MDPI and ACS Style

de Bettin, F.; Cappellaro, A.; Salasnich, L. Action Functional for a Particle with Damping. Condens. Matter 2019, 4, 81.

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