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Shortcuts to adiabatic rotation of a two-ion chain
(IOP, 2021-10)
We inverse engineer fast rotations of a transversally tight, linear trap with two ions for a predetermined rotation angle and time, avoiding final excitation. Different approaches are analyzed and compared when the ions ...
Energy Consumption for Ion-Transport in a Segmented Paul Trap
(IOP Publishing LTD, 2018-06-12)
There is recent interest in determining energy costs of shortcuts to adiabaticity (STA), but different definitions of ' cost' have been used. Wedemonstrate the importance of taking into account the control system (CS) for ...
Invariant-Based Inverse Engineering for Fast and Robust Load Transport in a Double Pendulum Bridge Crane
(MDPI, 2020-03-18)
We set a shortcut-to-adiabaticity strategy to design the trolley motion in a double-pendulum bridge crane. The trajectories found guarantee payload transport without residual excitation regardless of the initial conditions ...
Invariant-based inverse engineering of time-dependent, coupled harmonic oscillators
(American Physical Society, 2020-12-14)
Two-dimensional (2D) systems with time-dependent controls admit a quadratic Hamiltonian modeling near potential minima. Independent, dynamical normal modes facilitate inverse Hamiltonian engineering to control the system ...
Fast state and trap rotation of a particle in an anisotropic potential
(IOP Publishing, 2019-10-21)
We study the dynamics of a quantum or classical particle in a two-dimensional rotating anisotropic harmonic potential. By a sequence of symplectic transformations for constant rotation velocity we find uncoupled normal ...
Fast atom transport and launching in a nonrigid trap
(Springer Nature, 2017-07-18)
We study the shuttling of an atom in a trap with controllable position and frequency. Using invariant-based inverse engineering, protocols in which the trap is simultaneously displaced and expanded are proposed to speed ...
Energy consumption for shortcuts to adiabaticity
(APS, 2017-08-25)
Shortcuts to adiabaticity let a system reach the results of a slow adiabatic process in a shorter time. We propose to quantify the “energy cost” of the shortcut by the energy consumption of the system enlarged by including ...
Vanishing efficiency of speeded-up quantum Otto engines
(IOP, 2019-08-28)
We assess the energy cost of shortcuts to adiabatic expansions or compressions of a harmonic oscillator, the power strokes of a quantum Otto engine. Difficulties to identify the cost stem from the interplay between different ...