This work obtains the efficiency at maximum power for a stochastic heat
engine performing Carnot-like, Stirling-like and Ericsson-like cycles. For the
mesoscopic engine a Brownian particle trapped by an optical tweezers is
considered. The dynamics of this stochastic engine is described as an
overdamped Langevin equation with a harmonic potential, whereas is in contact
with two thermal baths at different temperatures, namely, hot (Th) and cold
(Tc). The harmonic oscillator Langevin equation is transformed into a
macroscopic equation associated with the mean value ⟨x2(t)⟩
using the original Langevin approach. At equilibrium stationary state this
quantity satisfies a state-like equation from which the thermodynamic
properties are calculated. To obtained the efficiency at maximum power it is
considered the finite-time cycle processes under the framework of low
dissipation approach.Comment: 2 3pages, 5 figure