Thermodynamics of the Ramsey Zone
Rog\'erio Jorge de Assis, Ciro Micheletti Diniz, Celso Jorge, Villas-B\^oas, Norton Gomes de Almeida

TL;DR
This paper investigates the thermodynamic properties of a Ramsey zone, analyzing how heat and work fluxes relate to atomic state purity and the quantum-to-classical transition, with implications for cavity quantum electrodynamics.
Contribution
It provides a detailed thermodynamic analysis of the Ramsey zone, linking heat and work fluxes to atomic purity and cavity parameters, and explains the classical behavior emergence.
Findings
Work flux dominates when atomic purity is high.
Heat flux becomes significant as atomic entanglement increases.
A large photon number is required for classical behavior despite low average photon count.
Abstract
We carry out a study on thermodynamics properties as entropy and heat and work fluxes involved in a Ramsey zone, i.e., a mode field inside a low quality factor cavity that behaves classically and promotes rotations on atomic states. Focusing on the atomic dynamic only, here we show that predominates when the atomic state evolves maintaining its maximum purity, as computed by von Neumann entropy, in which case the rotation is successfully applied. On the other hand, is the quantity that stands out when the atomic state ceases to be pure due to its entanglement with the cavity field mode state. We describe those limits in terms of the driving strength, the atom-field coupling and the cavity field dissipation rate, and interpret the quantum-to-classical transition in light of the heat and work fluxes. Besides, we show that for a driven-dissipative cavity…
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Taxonomy
TopicsMechanical and Optical Resonators · Advanced Thermodynamics and Statistical Mechanics · Nonlinear Dynamics and Pattern Formation
