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Chinese Physics Letters

A Proposal for Realizing an Array of Bose-Einstein Condensates

Yin Jian-Ping, Gao Wei-Jian, Jianjun Hu

Published Jun 28, 2002• 1 citation
Publisher

Abstract

We propose one-dimensional (1D) and two-dimensional (2D) arrays of magnetic surface microtraps for cold alkali atoms using some arrays of current-carrying wires and we calculate the spatial distributions of magnetic fields from the 1D and 2D arrays of current-carrying wires. The field gradients and curvatures from a single magnetic microtrap are analysed, and some interesting and periodic magnetic-well microstructures are found. The result shows that a magnetic-field gradient greater than 2.4 × 10 5 G/cm and a field curvature greater than 4.05 × 10 8 G/cm 2 can be generated in our array of magnetic microtraps, which can be used to realize the 1D and 2D arrays of Bose-Einstein condensations (or 1D and 2D arrays of Bose clusters) by rf-induced evaporative cooling, and then to form 1D and 2D atomic magnetic lattices, even to prepare 1D and 2D photonic crystals.

DOI
10.1088/0256-307x/19/7/317

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We propose one-dimensional (1D) and two-dimensional (2D) arrays of magnetic surface microtraps for cold alkali atoms using some arrays of current-carrying wires and we calculate the spatial distributions of magnetic fields from the 1D and 2D arrays of current-carrying wires. The field gradients and curvatures from a single magnetic microtrap are analysed, and some interesting and periodic magnetic-well microstructures are found. The result shows that a magnetic-field gradient greater than 2.4 × 10 5 G/cm and a field curvature greater than 4.05 × 10 8 G/cm 2 can be generated in our array of magnetic microtraps, which can be used to realize the 1D and 2D arrays of Bose-Einstein condensations (or 1D and 2D arrays of Bose clusters) by rf-induced evaporative cooling, and then to form 1D and 2D atomic magnetic lattices, even to prepare 1D and 2D photonic crystals.
A single microscopic magnetic trap for neutral atoms using planar current-carrying wires was proposed and studied theoretically by Weinstein et al.In this paper,we propose three structures of composite current-carrying wires to provide 1D,2D and 3D arrays of microscopic magnetic traps for cold alkali atoms.The spatial distributions of magnetic fields generated by these structures are calculated and the field gradient and curvature in each single microtrap are analysed.Our study shows that arrays of microscopic magnetic traps can be used to provide 1D,2D or 3D atomic magnetic lattices,and even to realize 1D,2D and 3D arrays of magneto-optical traps,and so on.
A single microscopic magnetic trap for neutral atoms using planar current-carrying wires was proposed and studied theoretically by Weinstein et al . In this paper, we propose three structures of composite current-carrying wires to provide 1D, 2D and 3D arrays of microscopic magnetic traps for cold alkali atoms. The spatial distributions of magnetic fields generated by these structures are calculated and the field gradient and curvature in each single microtrap are analysed. Our study shows that arrays of microscopic magnetic traps can be used to provide 1D, 2D or 3D atomic magnetic lattices and even to realize 1D, 2D and 3D arrays of magneto-optical traps and so on.
We propose a novel magnetic surface microtrap(i.e. a double Z-wire trap) for the study of two-species Bose-Einstein condensations.The spatial distributions of the magnetic fields from the double Z-wire configurations and their gradients and curvatures are calculated and analysed.The result shows that the proposed surface trap has double magnetic wells and can be continuously changed into a single-well trap be reducing the current in a straight wire,and the maximum field gradient greater than 5×10^4G/cm and the maximum field curvature (at each trap centre) greater than 2.5×10^7G/cm^2 can be generated in our double-well traps,which can be used to realize two-species Bose-Einstein condensations and to study the properties of double-well Bose-Einstein condensations and so on
We propose a novel magnetic surface microtrap (i.e. a double Z-wire trap) for the study of two-species Bose-Einstein condensations. The spatial distributions of the magnetic fields from the double Z-wire configurations and their gradients and curvatures are calculated and analysed. The result shows that the proposed surface trap has double magnetic wells and can be continuously changed into a single-well trap by reducing the current in a straight wire, and the maximum field gradient greater than 5 × 10 4 G/cm and the maximum field curvature (at each trap centre) greater than 2.5 × 10 7 G/cm 2 can be generated in our double-well traps, which can be used to realize two-species Bose-Einstein condensations and to study the properties of double-well Bose-Einstein condensations and so on.
We propose a novel scheme to construct one-, two- or three-dimensional (1D, 2D or 3D) atomic magnetic lattices by using various arrays of microscopic magnetic traps, which are composed of some arrays of current-carrying wires. The magnetic field distributions from 1D, 2D and 3D arrays of the current-carrying wires are calculated, and some interesting and periodic magnetic microstructures are found. Our study shows that these magnetic lattices may be used to prepare 1D, 2D or 3D photonic crystals and so on.