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Directly Trapping Atoms in a U-Shaped Magneto-Optical Trap Using a Mini Atom Chip

Hui Yan, Yang Guo-Qing, Wang Jin +1 more

We experimentally demonstrate the trapping of 85 Rb atoms directly on a chip-size U-shaped magneto-optical trap (U-MOT). The trap includes a U-shaped wire on the chip, two bias magnetic field coils and laser beams. The capture volume of the U-MOT is theoretically calculated, and the trap is experimentally realized. With 2 A current applied to the U-shaped wire and 2-Gauss horizontal bias field, more than 2 × 10 6 atoms are trapped. In contrast with an ordinary mirror-MOT, this U-MOT captures atoms directly from the background, thus the trap size is greatly reduced. Based on this mini trap scheme, it is possible to realize a chip-size atom trap array for quantum information processing.We experimentally demonstrate the trapping of 85 Rb atoms directly on a chip-size U-shaped magneto-optical trap (U-MOT). The trap includes a U-shaped wire on the chip, two bias magnetic field coils and laser beams. The capture volume of the U-MOT is theoretically calculated, and the trap is experimentally realized. With 2 A current applied to the U-shaped wire and 2-Gauss horizontal bias field, more than 2 × 10 6 atoms are trapped. In contrast with an ordinary mirror-MOT, this U-MOT captures atoms directly from the background, thus the trap size is greatly reduced. Based on this mini trap scheme, it is possible to realize a chip-size atom trap array for quantum information processing.

Chinese Physics LettersSep 1, 20087 citations

Integrated magneto-optical traps for atom chips

S. Pollock

Jan 1, 20100 citations

Experimental demonstration of controllable double magneto-optical traps on an atom chip

Hui Yan, Yang Guo-Qing, Tao Shi +2 more

We demonstrate controllable double magneto-optical traps (DMOTs) on an atom chip: At first, DMOTs, which trap atoms directly from the background rubidium vapor in an ultrahigh-vacuum environment, are realized on an atom chip simultaneously. The double quadrupole magnetic fields are produced by two separate U-shaped microwires on the atom chip, combined with a bias magnetic field. Then, we determine the best parameters for a U-shaped magneto-optical trap (UMOT) through a detailed comparison of the capture ability at different currents and the bias magnetic field between two different geometric sizes of UMOT. Finally, we demonstrate the mixing and splitting of the DMOTs on the atom chip with the help of an extra pair of anti-Helmholtz coils.We demonstrate controllable double magneto-optical traps (DMOTs) on an atom chip: At first, DMOTs, which trap atoms directly from the background rubidium vapor in an ultrahigh-vacuum environment, are realized on an atom chip simultaneously. The double quadrupole magnetic fields are produced by two separate U-shaped microwires on the atom chip, combined with a bias magnetic field. Then, we determine the best parameters for a U-shaped magneto-optical trap (UMOT) through a detailed comparison of the capture ability at different currents and the bias magnetic field between two different geometric sizes of UMOT. Finally, we demonstrate the mixing and splitting of the DMOTs on the atom chip with the help of an extra pair of anti-Helmholtz coils.

Journal of the Optical Society of America BSep 16, 20082 citations

A Hybrid Nanophotonic-Magnetic Chip-Based Atom Trap

Charles Fancher, Adam T. Black, Marcel W. Pruessner +6 more

Bulletin of the American Physical SocietyMay 31, 20180 citations

Production and guidance of pulsed atomic beams on chip

Hui Yan, Yang Guo-Qing, Shi Tao +2 more

We demonstrated two experimental methods of producing and guiding pulsed atomic beams on chip. One is to trap atoms first in a U-type magneto-optical trap on the chip, then transfer them to the magnetic guide field and push them simultaneously by a continuous force from the power imbalance of the magneto-optical trap laser beams hence the pulsed cold atom beams are produced and move along the magnetic guide to the destination. The other is to trap atoms directly by a H-type magneto-optical trap, then push them to make them move along the magnetic guide field, thus high rate cold atom beams can be produced and guided on the chip.We demonstrated two experimental methods of producing and guiding pulsed atomic beams on chip. One is to trap atoms first in a U-type magneto-optical trap on the chip, then transfer them to the magnetic guide field and push them simultaneously by a continuous force from the power imbalance of the magneto-optical trap laser beams hence the pulsed cold atom beams are produced and move along the magnetic guide to the destination. The other is to trap atoms directly by a H-type magneto-optical trap, then push them to make them move along the magnetic guide field, thus high rate cold atom beams can be produced and guided on the chip.

Chinese Physics BFeb 1, 20103 citations

Magneto-optical traps for neutral atoms.

B. N. Jagatap, K. G. Manohar, Sanjay G. Nakhate +2 more

Jan 1, 19991 citation

Atom-Chip for Direct Magnetic Trapping of Atoms from U-Magneto-Optical Trap

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