Transport of ions in a segmented linear Paul trap in printed-circuit-board technology

Huber, G.; Deuschle, T.; Schnitzler, Wolfgang; Reichle, R.; Singer, Kilian; Schmidt‐Kaler, F.

doi:10.1088/1367-2630/10/1/013004

Cited by 70 publications

(88 citation statements)

References 24 publications

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“…For some applications, however, this takes too long. In particular, since transport could occupy most of the operation time of realistic quantum information algorithms, "shuttling times" need to be minimized [2,21]. In addition, long times may be counterproductive in practice and induce overheating from coils or fluctuating fields and decoherence.…”

Section: Introductionmentioning

confidence: 99%

Fast atomic transport without vibrational heating

et al. 2011

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We use the dynamical invariants associated with the Hamiltonian of an atom in a one dimensional moving trap to inverse engineer the trap motion and perform fast atomic transport without final vibrational heating. The atom is driven non-adiabatically through a shortcut to the result of adiabatic, slow trap motion. For harmonic potentials this only requires designing appropriate trap trajectories, whereas perfect transport in anharmonic traps may be achieved by applying an extra field to compensate the forces in the rest frame of the trap. The results can be extended to atom stopping or launching. The limitations due to geometrical constraints, energies and accelerations involved are analyzed, as well as the relation to previous approaches (based on classical trajectories or "fast-forward" and "bang-bang" methods) which can be integrated in the invariant-based framework.

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Section: Introductionmentioning

confidence: 99%

Fast atomic transport without vibrational heating

et al. 2011

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“…down to the single phonon regime. Doppler recooling [17] and ion loss rates have previously been used to measure extremely large energy transfers [18]. Rabi oscillations on the motional sidebands of the Raman transition (see Fig.…”

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confidence: 99%

Controlling Fast Transport of Cold Trapped Ions

et al. 2012

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We realize fast transport of ions in a segmented micro-structured Paul trap. The ion is shuttled over a distance of more than 10 4 times its groundstate wavefunction size during only 5 motional cycles of the trap (280 µm in 3.6 µs). Starting from a ground-state-cooled ion, we find an optimized transport such that the energy increase is as low as 0.10±0.01 motional quanta. In addition, we demonstrate that quantum information stored in a spin-motion entangled state is preserved throughout the transport. Shuttling operations are concatenated, as a proof-of-principle for the shuttling-based architecture to scalable ion trap quantum computing. . Scalable information processing in a multiplexed ion trap can be accomplished by having fixed processing sites where logic operations are performed, and ion qubits will be moved in and out of these regions by shuttling operations. The duration of such shuttling has to be much faster than the relevant decoherence times [4]. Furthermore, it is desirable to reduce the total time consumption of all relevant operations, where shuttling will contribute a considerable amount [5], and aim for the performance of the naturally fast solid state architectures [6]. So far, ion shuttling in a multiplexed trap has been demonstrated together with additional sympathetic cooling [7], and in the adiabatic regime, where the transient displacement of the ion is smaller than the size of the its wavepacket [8,9]. Transport of neutral atoms have also been performed using magnetic [10] or optical [11] techniques.Because quantum gate operations require ions close to the motional ground state and fast transport inherently creates motional excitation, the challenge is to develop transport protocols that guarantee sufficiency small energy transfer. In this work we demonstrate shuttling operations that are highly non-adiabatic while the final state of the ion is close to the motional groundstate. We also show that quantum information stored in both the motional and the spin degree of freedom is preserved through the shuttling.During a shuttling operation, the ion motion in the harmonic trapping potential is excited when the acceleration is sufficiently strong. This motional excitation is a harmonic oscillation, characterized by a well defined phase, thus allowing it to be canceled out by proper management of the forces involved during or after the transport. We experimentally demonstrate two methods of canceling the acquired motional excitation. One method uses two shuttles, where the transport to the destination generates the same net momentum transfer as the transport back, but is applied 180 • out of phase with respect to the secular oscillation of the ion (Fig. 1b). We refer to this as the pairwise energy-neutral transport. For the second scheme, the self-neutral transport we apply a sharp counter-"kick" to the ion at the end of a single transport operation, stopping its motion (Fig. 1c). This case of single-sided transport allows even faster shuttling and can be sequentially repeated since it is ener...

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“…Each research group has a different electrode structure. Some typical electrode structures include rods [45,47], blades [48,49] and sheets [50]. Figure 2(b) shows a blade type linear trap of the Innsbruck group [48].…”

Section: Linear Trapmentioning

confidence: 99%

A review of silicon microfabricated ion traps for quantum information processing

Cho

Hong

Lee

et al. 2015

Micro and Nano Syst Lett

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Quantum information processing (QIP) has become a hot research topic as evidenced by S. Haroche and D. J. Wineland receiving the Nobel Prize in Physics in 2012. Various MEMS-based microfabrication methods will be a key enabling technology in implementing novel and scalable ion traps for QIP. This paper provides a brief introduction of ion trap devices, and reviews ion traps made using conventional precision machining as well as MEMS-based microfabrication. Then, microfabrication methods for ion traps are explained in detail. Finally, current research issues in microfabricated ion traps are presented. The QIP renders significant new challenges for MEMS, as various QIP technologies are being developed for secure encrypted communication and complex computing applications.

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Transport of ions in a segmented linear Paul trap in printed-circuit-board technology

Cited by 70 publications

References 24 publications

Fast atomic transport without vibrational heating

Fast atomic transport without vibrational heating

Controlling Fast Transport of Cold Trapped Ions

A review of silicon microfabricated ion traps for quantum information processing

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