Design of a surface electrode trap for parallel ion strings

Tanaka, U.; Suzuki, Kensuke; Ibaraki, Y.; Urabe, Shinji

doi:10.1088/0953-4075/47/3/035301

Cited by 22 publications

(39 citation statements)

References 25 publications

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“…The RF null has also been moved in a more smoothly continuous fashion by selectively adjusting the load capacitance of the trap electrodes [21,22]. This latter method has been used to switch between trapping configurations in which ions were in a single linear pseudopotential minimum and in two separated linear traps [23].Variation of the capacitive load can result in different RF electrodes having different phases, leading to significant micromotion. The method used in the present work is able to vary the amplitude of the RF while actively keeping the RF phase constant by feeding back to a varactor diode.…”

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Operation of a planar-electrode ion-trap array with adjustable RF electrodes

et al. 2016

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One path to realizing systems of trapped atomic ions suitable for large-scale quantum computing and simulation is to create a two-dimensional (2D) array of ion traps. Interactions between nearestneighbouring ions could then be turned on and off by tuning the ions' relative positions and frequencies. We demonstrate and characterize the operation of a planar-electrode ion-trap array. By driving the trap with a network of phase-locked radio-frequency resonators which provide independently variable voltage amplitudes we vary the position and motional frequency of a Ca + ion in two-dimensions within the trap array. Work on fabricating a miniaturised form of this 2D trap array is also described, which could ultimately provide a viable architecture for large-scale quantum simulations. means, linear arrays of ion traps have been demonstrated and ions in separate wells have been entangled [11]. The situation in a 2D array of traps, however, is more complicated as the ions are confined in at least two (and possibly three) directions by a pseudopotential created by a radio-frequency (RF) field. Sophisticated efforts to create a 2D array of linear ion traps whereby the ions are shuttled through junctions [4,14] have constituted an active area of research. Here, a method is investigated to vary the inter-ion spacing in a 2D array of point ion traps [15], while keeping the ions at their respective RF nulls.There have been experimental demonstrations of confining ions in a 2D array of point ion traps [16]. And the first realization of a 2D array of point traps on a microchip was able to demonstrate the ability to transfer ions between sites [17]. Chiaverini and Lybarger [18,19] have proposed dynamically re-configurable arrays in which RF electrode 'pixels' could be switched on or off. We have proposed an extension of the basic 2D array architecture by which the RF electrodes are segmented, allowing the positions and frequencies of trapped ions in a 2D array to be tuned by varying RF voltages [15]. As the RF voltage on a particular electrode is reduced, the electric field above that electrode falls, and the ion moves towards the region of reduced electric field. This is then analogous to the tuning of ions' positions and frequencies in a 1D array by varying DC voltages, though it allows the tuning to be done in both directions of the 2D array.There are a number of methods which may be used to apply RF voltages of different amplitudes to different electrodes, and thereby control the position of the RF null. At low frequencies, dust traps holding lycopodium spores have been reconfigured using variable alternating voltages of 50 Hz [15]. In ion traps, different electrodes can be driven with different amplitude voltages by utilizing different tapping points in a single helical resonator [20]. The RF null has also been moved in a more smoothly continuous fashion by selectively adjusting the load capacitance of the trap electrodes [21,22]. This latter method has been used to switch between trapping configurations in which ions were in...

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Operation of a planar-electrode ion-trap array with adjustable RF electrodes

et al. 2016

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“…The geometrical parameter is for both directions x and y equal in radially symmetric traps but in planar traps [28,39] the geometrical parameter for both directions can strongly differ. The ion dynamics in the radio-frequency trap is composed of the so-called micro motion, and a comparatively slow averaged motion taking place in an effective harmonic potential [12] V (x, y) = direction we assume the following phenomenological double well potential [38], with wells centered at ≈ ±z 0 and separated from each other by a barrier of height ∼ 1/C (see Fig.…”

Section: Setup Hamiltonian and Ground State Configurationmentioning

confidence: 99%

“…Much of this research on structure formation with trapped ions roots in the admirable advancements of the controllability of ions in recent years. This ranges from the quickly progressing miniaturization of ion traps and lab on chip technologies [18,40] via the advent of optical trapping techniques [35] to the discovery of multi-segmented Paul and Penning traps [37,39]. The latter example in particular allows for more and more complex but still controllable arrangements of long-range interacting particles as required e.g.…”

Section: Introductionmentioning

confidence: 99%

Quench dynamics of two coupled zig-zag ion chains

2016

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We explore the non-equilibrium dynamics of two coupled zig-zag chains of trapped ions in a double well potential. Following a quench of the potential barrier between both wells, the induced coupling between both chains due to the long-range interaction of the ions leads to their complete melting. The resulting dynamics is however not exclusively irregular but leads to phases of motion during which various ordered structures appear with ions arranged in arcs, lines and crosses. We quantify the emerging order by introducing a suitable measure and complement our analysis of the ion dynamics using a normal mode analysis showing a decisive population transfer between only a few distinguished modes.

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“…In addition to the Si-based surface traps mentioned in the above, surface traps with a single metal layer on a nonconductive substrate, fabricated by patterning Au electrodes on quartz or sapphire substrates [54,[66][67][68][69] have been reported. A surface trap has also been fabricated on printed circuit boards [70][71][72].…”

Section: Ybmentioning

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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Design of a surface electrode trap for parallel ion strings

Cited by 22 publications

References 25 publications

Operation of a planar-electrode ion-trap array with adjustable RF electrodes

Operation of a planar-electrode ion-trap array with adjustable RF electrodes

Quench dynamics of two coupled zig-zag ion chains

A review of silicon microfabricated ion traps for quantum information processing

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