Fast atom transport and launching in a nonrigid trap

Tobalina, A.; Palmero, M.; Martínez-Garaot, S.; Muga, J. G.

doi:10.1038/s41598-017-05823-x

Cited by 21 publications

(23 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the second method, in order to comply with all of the eight boundary conditions, we use a polynomial trajectory of the seventh order, written in terms of the normalized time as: This path for the atoms respects the invariant necessitated boundary conditions and its associated trap trajectory results with zero velocities at motion ends, so it is feasible to be implemented experimentally. The septic polynomial was also discussed by Tobalina et al in the context of launching atoms to a final velocity [34]. The trap trajectory is then given by (9),…”

Section: Methods Ii: Septic Polynomial Trajectorymentioning

confidence: 98%

“…Ultracold atoms can be trapped in the vicinity of potential minimum, which for the lowest energy optical mode, namely a Gaussian beam, is at the focal point ('waist'). Rapid changes may be desired in the trap shape [12,21,22,24,32] or position [15,16,18,19,[32][33][34]. Optical transfer of ultracold atoms can be used to move atoms between different sites or implement quantum gates [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Realistic shortcuts to adiabaticity in optical transfer

et al. 2018

View full text Add to dashboard Cite

Shortcuts to adiabaticity are techniques allowing rapid variation of the system Hamiltonian without inducing excess heating. Fast optical transfer of atoms between different locations is an important application of shortcuts to adiabaticity. We show that the common boundary conditions on the atomic position, which are imposed to find the driving trajectory, lead to highly non-practical boundary conditions for the optical trap. Our experimental results demonstrate that, as a result, previously suggested trajectories are likely to fall short of the expectation. We develop two complementary methods that solve this boundary conditions problem by adding more degrees of freedom to the trajectory parameter space. In the first method, this is achieved by the addition of a spectral component at the trapping frequency, while in the second we use a polynomial trajectory of an order high enough to account for the new boundary conditions. We experimentally demonstrate that this approach allows us to construct highly non-adiabatic movements with no residual sloshing. Our techniques can also account for non-harmonic terms in the confining potential.

show abstract

Section: Methods Ii: Septic Polynomial Trajectorymentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Realistic shortcuts to adiabaticity in optical transfer

et al. 2018

View full text Add to dashboard Cite

show abstract

“…More general cases for multiparticle systems are discussed in the following subsection. Tobalina et al (2017) used the invariants to design shortcuts to adiabaticity for nonrigid driven transport and to launch particles in harmonic and general potentials. Compared to rigid transport, nonrigid transport requieres a more demanding manipulation, but it also provides a wider range of control opportunities, for example to achieve narrow velocity distributions in a launching process, suitable for accurate ion implantation or lowenergy scattering experiments.…”

Section: Expansions Invariant Based Inverse Engineering Formentioning

confidence: 99%

Shortcuts to adiabaticity: Concepts, methods, and applications

et al. 2019

Self Cite

View full text Add to dashboard Cite

Shortcuts to adiabaticity (STA) are fast routes to the final results of slow, adiabatic changes of the controlling parameters of a system. The shortcuts are designed by a set of analytical and numerical methods suitable for different systems and conditions. A motivation to apply STA methods to quantum systems is to manipulate them on timescales shorter than decoherence times. Thus shortcuts to adiabaticity have become instrumental in preparing and driving internal and motional states in atomic, molecular, and solid-state physics. Applications range from information transfer and processing based on gates or analog paradigms, to interferometry and metrology. The multiplicity of STA paths for the controlling parameters may be used to enhance robustness versus noise and perturbations, or to optimize relevant variables. Since adiabaticity is a widespread phenomenon, STA methods also extended beyond the quantum world, to optical devices, classical mechanical systems, and statistical physics. Shortcuts to adiabaticity combine well with other concepts and techniques, in particular with optimal control theory, and pose fundamental scientific and engineering questions such as finding speed limits, quantifying the third law, or determining process energy costs and efficiencies. We review concepts, methods and applications of shortcuts to adiabaticity and outline promising prospects, as well as open questions and challenges ahead.

show abstract

“…Different trapping configurations, such us a non-rigid harmonic potential or a double well potential have been examined for more complex transport protocols, e.g. in [35], but these generalizations are not needed for our current purpose.…”

Section: Compensating Force Approach For a Transport Processmentioning

confidence: 99%

Energy consumption for ion-transport in a segmented Paul trap

2018

View full text Add to dashboard Cite

There is recent interest in determining energy costs of shortcuts to adiabaticity (STA), but different definitions of 'cost' have been used. We demonstrate the importance of taking into account the control system (CS) for a fair assessment of energy flows and consumptions. We model the energy consumption and power to transport an ion by a STA protocol in a multisegmented Paul trap. The ion is driven by an externally controlled, moving harmonic oscillator. Even if no net ion-energy is gained at destination, setting the time-dependent control parameters is a macroscopic operation that costs energy and results in energy dissipation for the short time scales implied by the intrinsically fast STA processes. The potential minimum is displaced by modulating the voltages on control (dc) electrodes. A secondary effect of the modulation, usually ignored as it does not affect the ion dynamics, is the time-dependent energy shift of the potential minimum. The non trivial part of the energy consumption is due to the electromotive forces to set the electrode voltages through the low-pass filters required to preserve the electronic noise from decohering the ion's motion. The results for the macroscopic CS (the Paul trap) are compared to the microscopic power and energy of the ion alone.Similarities are found-and may be used quantitatively to minimize costs-only when the CSdependent energy shift of the harmonic oscillator is included in the ion-energy.

show abstract

Fast atom transport and launching in a nonrigid trap

Cited by 21 publications

References 37 publications

Realistic shortcuts to adiabaticity in optical transfer

Realistic shortcuts to adiabaticity in optical transfer

Shortcuts to adiabaticity: Concepts, methods, and applications

Energy consumption for ion-transport in a segmented Paul trap

Contact Info

Product

Resources

About