Markovian master equation and thermodynamics of a two-level system in a strong laser field

• Published in: Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2013-01, Vol.87 (1), p.012120-012120, Article 012120
• Main Authors: Szczygielski, Krzysztof, Gelbwaser-Klimovsky, David, Alicki, Robert
• Format: Article
• Language: English
• Subjects: Computer Simulation; Lasers; Markov Chains; Models, Statistical; Scattering, Radiation; Thermodynamics
• ISSN: 1539-3755; 1550-2376
• DOI: 10.1103/physreve.87.012120

The recently developed technique combining the weak-coupling limit with the Floquet formalism is applied to a model of a two-level atom driven by a strong laser field and weakly coupled to heat baths. First, the case of a single electromagnetic bath at zero temperature is discussed and the formula for resonance fluorescence is derived. The expression describes the well-known Mollow triplet, but its details differ from the standard ones based on additional simplifying assumptions. The second example describes the case of two thermal reservoirs: an electromagnetic one at finite temperature and the second dephasing one, which can be realized as a phononic or buffer gas reservoir. It is shown using the developed thermodynamical approach that the latter system can work in two regimes depending on the detuning sign: a heat pump transporting heat from the dephasing reservoir to an electromagnetic bath or heating both, always at the expense of work supplied by the laser field.