8 papers · 1 filter
Shortcuts to adiabatic rotation of a two-ion chain
Ander Tobalina, Juan Gonzalo Muga, Ion Lizuain +1
We inverse engineer fast rotations of a linear trap with two ions for a predetermined rotation angle and time, avoiding final excitation. Different approaches are analyzed and comp…
Invariant-based inverse engineering of time-dependent, coupled harmonic oscillators
A. Tobalina, E. Torrontegui, I. Lizuain +2
Two-dimensional systems with time-dependent controls admit a quadratic Hamiltonian modelling near potential minima. Independent, dynamical normal modes facilitate inverse Hamiltoni…
Time-dependent harmonic potentials for momentum or position scaling
J. G. Muga, S. Martínez-Garaot, M. Pons +2
Cooling methods and particle slowers as well as accelerators are basic tools for fundamental research and applications in different fields and systems. We put forward a generic mec…
Fast Route to Thermalization
Roie Dann, Ander Tobalina, Ronnie Kosloff
We present a control scheme for quantum systems coupled to a thermal bath. We demonstrate state-to-state control between two Gibbs states. This scheme can be used to accelerate the…
Vanishing efficiency of speeded-up quantum Otto engines
Ander Tobalina, Ion Lizuain, J. Gonzalo Muga
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 co…
Fast state and trap rotation of a particle in an anisotropic potential
I. Lizuain, A. Tobalina, A. Rodriguez-Prieto +1
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 rota…