AI Article Synopsis
- The study introduces a quantum Otto engine (QOE) using a two-level atom confined in a one-dimensional harmonic trap, interacting with single-mode radiation fields.
- The QOE cycle includes two adiabatic and two isochoric processes, with performance analysis deriving the time for adiabatic processes.
- Results indicate that the efficiency at maximum power output depends on the trap exponent but not on the energy spectrum index.
Article Abstract
We establish a quantum Otto engine (QOE) of a two-level atom, which is confined in a one-dimensional (1D) harmonic trap and is coupled to single-mode radiation fields. Besides two adiabatic processes, the QOE cycle consists of two isochoric processes, along one of which the two-level atom as the working substance interacts with a single-mode radiation field. Based on the semigroup approach, we derive the time for completing any adiabatic process and then present a performance analysis of the heat engine model. Furthermore, we generalize the results to the performance optimization for a QOE of a single two-level atom trapped in a 1D power-law potential. Our result shows that the efficiency at maximum power output is dependent on the trap exponent θ but is independent of the energy spectrum index σ.
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| http://dx.doi.org/10.1103/PhysRevE.85.041148 | DOI Listing |
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