Optimization of Segmented Linear Paul Traps and Transport of Stored Particles

Schulz, Stephan; Poschinger, Ulrich; Singer, Kilian; Schmidt-Kaler, F.

doi:10.1002/9783527611065.ch2

Cited by 19 publications

(20 citation statements)

References 49 publications

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“…When the control switches, there is a discontinuity in y 2 34) expressing the change in the center of the generating circle, (x 3 , ±1) → (x 3 , ∓1). Note that…”

Section: Lemma 1 (Main Technical Point)mentioning

confidence: 99%

“…This nonadiabatic regime, leading to shorter transport times [33], provides a privileged area for applying optimal control techniques. Numerical optimization methods have been used to calculate the optimal currents in a segmented Paul trap for fast transport of ions while suppressing vibrational heating [34], [35]. Fast quantum transport using optical tweezers, where the acceleration is altered in a bang-bang manner, has been demonstrated experimentally [36] and studied theoretically [37].…”

Section: Introductionmentioning

confidence: 99%

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Minimum-Time Quantum Transport With Bounded Trap Velocity

Stefanatos

2014

IEEE Trans. Automat. Contr.

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We formulate the problem of efficient transport of a quantum particle trapped in a harmonic potential which can move with a bounded velocity, as a minimum-time problem on a linear system with bounded input. We completely solve the corresponding optimal control problem and obtain an interesting bangbang solution. These results are expected to find applications in quantum information processing, where quantum transport between the storage and processing units of a quantum computer is an essential step.They can also be extended to the efficient transport of Bose-Einstein condensates, where the ability to control them is crucial for their potential use as interferometric sensors.

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“…When the control switches, there is a discontinuity in y 2 34) expressing the change in the center of the generating circle, (x 3 , ±1) → (x 3 , ∓1). Note that…”

Section: Lemma 1 (Main Technical Point)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Minimum-Time Quantum Transport With Bounded Trap Velocity

Stefanatos

2014

IEEE Trans. Automat. Contr.

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“…A great effort in scalable trap engineering has been already made in quantum information experiments with trapped ions ( [6,7,8,9,10,11,12,13,14]). Here, fast ion transport is required and relevant time scales are in the millisecond regime or below, thus electrode dimensions are comparatively small.…”

Section: Introductionmentioning

confidence: 99%

A high-precision segmented Paul trap with minimized micromotion for an optical multiple-ion clock

et al. 2013

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We present an experiment to characterize our new linear ion trap designed for the operation of a many-ion optical clock using 115 In + as clock ions. For the characterization of the trap as well as the sympathetic cooling of the clock ions we use 172 Yb + . The trap design has been derived from finite element method (FEM) calculations and a first prototype based on glass-reinforced thermoset laminates was built. This paper details on the trap manufacturing process and micromotion measurement. Excess micromotion is measured using photon-correlation spectroscopy with a resolution of 1.1 nm in motional amplitude, and residual axial rf fields in this trap are compared to FEM calculations. With this method, we demonstrate a sensitivity to systematic clock shifts due to excess micromotion of |(∆ν/ν) mm | = 8.5 × 10 −20 . Based on the measurement of axial rf fields of our trap, we estimate a number of twelve ions that can be stored per trapping segment and used as an optical frequency standard with a fractional inaccuracy of ≤ 1 × 10 −18 due to micromotion.Submitted to: New J. Phys.

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“…Our setup consists of a variation of the segmented, microstructured Paul trap described in [43,45], adapted to accommodate a fiber based cavity similar to [46] as depicted in Fig. 3.…”

Section: Segmented Microtrapmentioning

confidence: 99%

A quantum repeater node with trapped ions: a realistic case example

et al. 2016

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We evaluate the feasibility of the implementation of two quantum repeater protocols with an existing experimental platform based on a 40 Ca + -ion in a segmented micro trap, and a third one that requires small changes to the platform. A fiber cavity serves as an ion-light interface. Its small mode volume allows for a large coupling strength of g c = 2π × 20 MHz despite comparatively large losses κ = 2π × 18.3 MHz. With a fiber diameter of 125 μm, the cavity is integrated into the microstructured ion trap, which in turn is used to transport single ions in and out of the interaction zone in the fiber cavity. We evaluate the entanglement generation rate for a given fidelity using parameters from the experimental setup. The DLCZ protocol [1] and the hybrid protocol [2] outperform the EPR protocol [3]. We calculate rates of more than than 100 s −1 for non-local Bell state fidelities larger than 0.95 with the existing platform. We identify parameters which mainly limit the attainable rates, and conclude that entanglement generation rates of 750 s −1 at fidelities of 0.95 are within reach with current technology. arXiv:1508.05272v2 [quant-ph]

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Optimization of Segmented Linear Paul Traps and Transport of Stored Particles

Cited by 19 publications

References 49 publications

Minimum-Time Quantum Transport With Bounded Trap Velocity

Minimum-Time Quantum Transport With Bounded Trap Velocity

A high-precision segmented Paul trap with minimized micromotion for an optical multiple-ion clock

A quantum repeater node with trapped ions: a realistic case example

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