Trapping cold atoms using surface-grown carbon nanotubes

Petrov, Plamen G.; Machluf, Shimon; Younis, Sumaira; Macaluso, Roberto; Tománek, David; Hadad, B.; Japha, Yonathan; Keil, Mark; Joselevich, Ernesto; Folman, R.

doi:10.1103/physreva.79.043403

Cited by 24 publications

(32 citation statements)

References 72 publications

(110 reference statements)

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“…Indeed, as shown quantitatively in previous work [8], good control over tunneling barriers is possible for distances of 5 µm and below. In future it may be beneficial to use nanowires in order to considerably increase the magnetic field gradients so that they can overcome the Casimir-Polder potential at smaller distances, or to utilize molecular conductors such as carbon nanotubes [53] or graphene sheets [54], both of which would reduce Johnson noise and potential corrugations due to electron scattering.…”

Section: Discussionmentioning

confidence: 99%

Robust spatial coherence5μmfrom a room-temperature atom chip

et al. 2016

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We study spatial coherence near a classical environment by loading a Bose-Einstein condensate into a magnetic lattice potential and observing diffraction. Even very close to a surface (5 µm), and even when the surface is at room temperature, spatial coherence persists for a relatively long time (≥ 500 ms). In addition, the observed spatial coherence extends over several lattice sites, a significantly greater distance than the atom-surface separation. This opens the door for atomic circuits, and may help elucidate the interplay between spatial dephasing, inter-atomic interactions, and external noise.

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Section: Discussionmentioning

confidence: 99%

Robust spatial coherence5μmfrom a room-temperature atom chip

et al. 2016

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“…CNTs are able to hold a current density which is 2-3 orders of magnitude higher than that for gold. Consequently, although they have a very small cross section, they may hold enough current to create stable atom traps [26,85,86]. As they are crystalline [31] with a theoretical calculation (solid line).…”

Section: Materials Engineering For Johnson Noisementioning

confidence: 99%

“…The EM modes of the combined surface+wire system are not analytically solvable and we will therefore carry out a separate examination of the CP potential emerging from the Si+SiO 2 planar wafer, as discussed also in Ref. [85], and from a simplified model that takes the wire as a perfectly conducting circular cylinder of a certain diameter. We then take the sum of the two contributions as an estimate for the combined potential as a sort of pairwise additive approximation (PAA).…”

Section: Nanofabricated Wiresmentioning

confidence: 99%

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Material science for quantum computing with atom chips

Folman

2011

Quantum Inf Process

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In its most general form, the atom chip is a device in which neutral or charged particles are positioned in an isolating environment such as vacuum (or even a carbon solid state lattice) near the chip surface. The chip may then be used to interact in a highly controlled manner with the quantum state. I outline the importance of material science to quantum computing (QC) with atom chips, where the latter may be utilized for many, if not all, suggested implementations of QC. Material science is important both for enhancing the control coupling to the quantum system for preparation and manipulation as well as measurement, and for suppressing the uncontrolled coupling giving rise to low fidelity through static and dynamic effects such as potential corrugations and noise. As a case study, atom chips for neutral ground state atoms are analyzed and it is shown that nanofabricated wires will allow for more than 10 4 gate operations when considering spin-flips and decoherence. The effects of fabrication imperfections and the Casimir-Polder force are also analyzed. In addition, alternative approaches to current-carrying wires are briefly described. Finally, an outlook of what materials and geometries may be required is presented, as well as an outline of directions for further study.

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“…In this paper we take as an example the atom chip [18][19][20], which provides a unique micro-lab for experimentation with ultra cold gases and Bose-Einstein Condensates (BEC) [21,22]. The chip has micro and nano-structured wires and electrodes on its surface [23,24], creating static magnetic or electric fields, as well as micro-wave and radio-frequency fields to trap, guide and manipulate clouds of neutral atoms as close as a few hundred nano-meters from the surface (below that the Casimir-Polder force overcomes the other forces). The atom chip has proven to enable spatial coherence close to the surface [25].…”

Section: Introductionmentioning

confidence: 99%

Dynamic matter-wave pulse shaping

et al. 2010

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In this paper we discuss possibilities to manipulate a matter-wave with time-dependent potentials. Assuming a specific setup on an atom chip, we explore how one can focus, accelerate, reflect, and stop an atomic wave packet, with, for example, electric fields from an array of electrodes. We also utilize this method to initiate coherent splitting or an arbitrary wave form. Special emphasis is put on the robustness of the control schemes. We begin with the wave packet of a single atom, and extend this to a BEC, in the Gross-Pitaevskii picture. In analogy to laser pulse shaping with its wide variety of applications, we expect this work to form the base for more complex time-dependent potentials eventually leading to matter-wave pulse shaping with numerous applications.

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Trapping cold atoms using surface-grown carbon nanotubes

Cited by 24 publications

References 72 publications

Robust spatial coherence5μmfrom a room-temperature atom chip

Robust spatial coherence5μmfrom a room-temperature atom chip

Material science for quantum computing with atom chips

Dynamic matter-wave pulse shaping

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