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6 papers · 2 filters
Steering the optimization pathway in the control landscape using constraints
José P. Palao, Daniel M. Reich, Christiane P. Koch
We show how additional constraints, restricting the spectrum of the optimized pulse or confining the system dynamics, can be used to steer optimization in quantum control towards d…
Quantum-enhanced absorption refrigerators
Luis A. Correa, José P. Palao, Daniel Alonso +1
Thermodynamics is a branch of science blessed by an unparalleled combination of generality of scope and formal simplicity. Based on few natural assumptions together with the four l…
Gaussian entanglement induced by an extended thermal environment
Antonio A. Valido, Daniel Alonso, Sigmund Kohler
We study stationary entanglement among three harmonic oscillators which are dipole coupled to a one-dimensional or a three-dimensional bosonic environment. The analysis of the open…
Optimal control under spectral constraints: Enforcing multi-photon absorption pathways
Daniel M. Reich, José P. Palao, Christiane P. Koch
Shaped pulses obtained by optimal control theory often possess unphysically broad spectra. In principle, the spectral width of a pulse can be restricted by an additional constraint…
Gaussian tripartite entanglement out of equilibrium
Antonio A. Valido, Luis A. Correa, Daniel Alonso
The stationary multipartite entanglement between three interacting harmonic oscillators subjected to decoherence is analyzed in the largely unexplored non-equilibrium strong dissip…
Fast and robust population transfer in two-level quantum systems with dephasing noise and/or systematic frequency errors
Xiao-Jing Lu, Xi Chen, A. Ruschhaupt +3
We design, by invariant-based inverse engineering, driving fields that invert the population of a two-level atom in a given time, robustly with respect to dephasing noise and/or sy…