Non-equilibrium properties of trapped ions under sudden application of a laser
arXiv:1604.05732 · doi:10.1103/PhysRevA.94.013406
Abstract
Coherent quantum-state manipulation of trapped ions using classical laser fields is a trademark of modern quantum technologies. In this work, we study aspects of work statistics and irreversibility in a single trapped ion due to sudden interaction with the impinging laser. This is clearly an out-of-equilibrium process where work is performed through illumination of an ion by the laser. Starting with the explicit evaluation of the first moments of the work distribution, we proceed to a careful analysis of irreversibility as quantified by the nonequilibrium lag. The treatment employed here is not restricted to the Lamb-Dicke limit, which allows us to investigate the interplay between nonlinearities and irreversibility. We show that in these multiquantum or sideband regimes, variation of the Lamb-Dicke parameter causes a non-monotonic behavior of the irreversibility indicator. Counterintuitively, we find a working point where nonlinearity helps reversibility, making the sudden quench of the Hamiltonian closer to what would have been obtained quasistatically and isothermally.
10 pages, 6 figures, Published version
References in corpus (12)
- A single-atom heat engine
- Fluctuation theorems: Work is not an observable
- Single ion heat engine with maximum efficiency at maximum power
- Manipulation and Detection of a Trapped Yb+ Ion Hyperfine Qubit
- Experimental Test of Quantum Jarzynski Equality with a Trapped Ion System
- Fluctuation Theorem for Arbitrary Open Quantum Systems
- Generalized Clausius inequality for nonequilibrium quantum processes
- Nonequilibrium fluctuations in quantum heat engines: Theory, example, and possible solid state experiments
- Irreversible work and inner friction in quantum thermodynamic processes
- Employing trapped cold ions to verify the quantum Jarzynski equality
- Fluctuation theorems in driven open quantum systems
- Assessing the non-equilibrium thermodynamics in a quenched quantum many-body system via single projective measurements