Polarization-dependent atomic dipole traps behind a circular aperture for neutral-atom quantum computing

Gillen, Glen; Copsey, Bert

doi:10.1103/physreva.83.023408

Cited by 8 publications

(3 citation statements)

References 45 publications

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“…Superfluidity anisotropy of polarized fermion systems was shown in [23] and their thermodynamic and correlation properties were investigated [24]. The effect of EDM in a system of cooled neutral atoms which are used for quantum computing and quantum memory devices was analyzed in [25].…”

Section: Introductionmentioning

confidence: 99%

Dipole-dipole interaction and polarization mode in BEC

Andreev,

Kuzmenkov

2011

Preprint

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We propose the construction of a set of quantum hydrodynamics equations for the Bose-Einstein condensate (BEC) where atoms have electric dipole moment (EDM). The contribution of the dipole-dipole interactions (DDI) to the Euler equation is estimated. Quantum equations for the evolution of medium polarization are constructed for the first time. The mathematical method we developed allows studying the effects of interactions on the evolution of polarization. The developed method may be applied to various physical systems in which dynamics is affected by DDI. A problem of elementary excitations in BEC, either affected or not affected by the uniform external electric field, is addressed using our method. We show that the evolution of polarization in BEC leads to the formation of a novel type of elementary excitations. Also, we consider the process of wave generation in polarized BEC by means of monoenergetic beam of neutral polarized particles. We compute the possibilities of the generation of Bogoliubov's modes and polarization modes by the dipole beam.

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Section: Introductionmentioning

confidence: 99%

Dipole-dipole interaction and polarization mode in BEC

Andreev,

Kuzmenkov

2011

Preprint

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“…Currently, arrays of several hundred atoms have been implemented with opticallyaddressable spacings of a few µm [7,8], and this number is expected to increase to a few thousand as laser power permits. These atoms are confined by an array of optical-dipole traps made through various methods including holographic devices [9], diffractive optical elements [10,11], micro-lens arrays [12], and optical lattices [13]. Ultimately, neutral-atom platforms for QIP may require (i) a significant number of atoms, (ii) a highdimensional architecture, preferably with an arbitrary lattice geometry, (iii) single-atom loading per site, and (iv) the ability to be individually addressable.…”

Section: Introductionmentioning

confidence: 99%

Defect-free atomic array formation using the Hungarian matching algorithm

2017

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Deterministic loading of single atoms onto arbitrary two-dimensional lattice points has recently been demonstrated, where by dynamically controlling the optical-dipole potential, atoms from a probabilistically loaded lattice were relocated to target lattice points to form a zero-entropy atomic lattice. In this atom rearrangement, how to pair atoms with the target sites is a combinatorial optimization problem: brute-force methods search all possible combinations so the process is slow, while heuristic methods are time-efficient but optimal solutions are not guaranteed. Here, we use the Hungarian matching algorithm as a fast and rigorous alternative to this problem of defect-free atomic lattice formation. Our approach utilizes an optimization cost function that restricts collision-free guiding paths so that atom loss due to collision is minimized during rearrangement. Experiments were performed with cold rubidium atoms that were trapped and guided with holographically controlled optical-dipole traps. The result of atom relocation from a partially filled 7-by-7 lattice to a 3-by-3 target lattice strongly agrees with the theoretical analysis: using the Hungarian algorithm minimizes the collisional and trespassing paths and results in improved performance, with over 50% higher success probability than the heuristic shortest-move method.

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“…The effect of the EDM on a system of cooled neutral atoms which are used for the quantum computing and quantum memory devices was analyzed in Ref. [61].…”

Section: Introductionmentioning

confidence: 99%

Self-consistent field theory of polarised Bose-Einstein condensates: dispersion of collective excitations

Andreev

Kuz'menkov

2013

Eur. Phys. J. D

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We suggest the construction of a set of the quantum hydrodynamics equations for the Bose-Einstein condensate (BEC), where atoms have the electric dipole moment. The contribution of the dipole-dipole interactions (DDI) to the Euler equation is obtained. Quantum equations for the evolution of medium polarization are derived. Developing mathematical method allows to study effect of interactions on the evolution of polarization. The developing method can be applied to various physical systems in which dynamics is affected by the DDI. Derivation of Gross-Pitaevskii equation for polarized particles from the quantum hydrodynamics is described. We showed that the Gross-Pitaevskii equation appears at condition when all dipoles have the same direction which does not change in time. Comparison of the equation of the electric dipole evolution with the equation of the magnetization evolution is described. Dispersion of the collective excitations in the dipolar BEC, either affected or not affected by the uniform external electric field, is considered using our method. We show that the evolution of polarization in the BEC leads to the formation of a novel type of the collective excitations. Detailed description of the dispersion of collective excitations is presented. We also consider the process of wave generation in the polarized BEC by means of a monoenergetic beam of neutral polarized particles. We compute the possibilities of the generation of Bogoliubov and polarization modes by the dipole beam.

show abstract

Polarization-dependent atomic dipole traps behind a circular aperture for neutral-atom quantum computing

Cited by 8 publications

References 45 publications

Dipole-dipole interaction and polarization mode in BEC

Dipole-dipole interaction and polarization mode in BEC

Defect-free atomic array formation using the Hungarian matching algorithm

Self-consistent field theory of polarised Bose-Einstein condensates: dispersion of collective excitations

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