skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electrodynamic Trapping of Spinless Neutral Atoms with an Atom Chip

Abstract

Three-dimensional electrodynamic trapping of neutral atoms has been demonstrated. By applying time-varying inhomogeneous electric fields with micron-sized electrodes, nearly 10{sup 2} strontium atoms in the {sup 1}S{sub 0} state have been trapped with a lifetime of 80 ms. In order to design the electrodes, we numerically analyzed the electric field and simulated atomic trajectories in the trap, which showed reasonable agreement with the experiment.

Authors:
 [1]; ; ;  [2];  [3];  [1];  [4]
  1. PRESTO, Japan Science and Technology Agency, Bunkyo-ku, Tokyo 113-8656 (Japan)
  2. Department of Applied Physics, School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113-8656 (Japan)
  3. Department of Engineering Synthesis, School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113-8656 (Japan)
  4. (Japan)
Publication Date:
OSTI Identifier:
20777117
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 12; Other Information: DOI: 10.1103/PhysRevLett.96.123001; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ATOMIC CLUSTERS; ATOMS; COOLING; ELECTRIC FIELDS; ELECTRODES; LASERS; LIFETIME; PHOTON-ATOM COLLISIONS; STRONTIUM; THREE-DIMENSIONAL CALCULATIONS; TRAJECTORIES; TRAPPING; TRAPS

Citation Formats

Kishimoto, T., Hachisu, H., Fujiki, J., Yasuda, M., Nagato, K., Katori, H., and Department of Applied Physics, School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113-8656. Electrodynamic Trapping of Spinless Neutral Atoms with an Atom Chip. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.96.123001.
Kishimoto, T., Hachisu, H., Fujiki, J., Yasuda, M., Nagato, K., Katori, H., & Department of Applied Physics, School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113-8656. Electrodynamic Trapping of Spinless Neutral Atoms with an Atom Chip. United States. doi:10.1103/PhysRevLett.96.123001.
Kishimoto, T., Hachisu, H., Fujiki, J., Yasuda, M., Nagato, K., Katori, H., and Department of Applied Physics, School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113-8656. Fri . "Electrodynamic Trapping of Spinless Neutral Atoms with an Atom Chip". United States. doi:10.1103/PhysRevLett.96.123001.
@article{osti_20777117,
title = {Electrodynamic Trapping of Spinless Neutral Atoms with an Atom Chip},
author = {Kishimoto, T. and Hachisu, H. and Fujiki, J. and Yasuda, M. and Nagato, K. and Katori, H. and Department of Applied Physics, School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113-8656},
abstractNote = {Three-dimensional electrodynamic trapping of neutral atoms has been demonstrated. By applying time-varying inhomogeneous electric fields with micron-sized electrodes, nearly 10{sup 2} strontium atoms in the {sup 1}S{sub 0} state have been trapped with a lifetime of 80 ms. In order to design the electrodes, we numerically analyzed the electric field and simulated atomic trajectories in the trap, which showed reasonable agreement with the experiment.},
doi = {10.1103/PhysRevLett.96.123001},
journal = {Physical Review Letters},
number = 12,
volume = 96,
place = {United States},
year = {Fri Mar 31 00:00:00 EST 2006},
month = {Fri Mar 31 00:00:00 EST 2006}
}
  • We describe experiments on the trapping of atoms in microscopic magneto-optical traps on an optically transparent permanent-magnet atom chip. The chip is made of magnetically hard ferrite-garnet material deposited on a dielectric substrate. The confining magnetic fields are produced by miniature magnetized patterns recorded in the film by magneto-optical techniques. We trap Rb atoms on these structures by applying three crossed pairs of counterpropagating laser beams in the conventional magneto-optical trapping geometry. We demonstrate the flexibility of the concept in creation and in situ modification of the trapping geometries through several experiments.
  • We report on photoionization of ultracold magnetically trapped Rb atoms on an atom chip. The atoms are trapped at 5 {mu}K in a strongly anisotropic trap. Through a hole in the chip with a diameter of 150 {mu}m, two laser beams are focused onto a fraction of the atomic cloud. A first laser beam with a wavelength of 778 nm excites the atoms via a two-photon transition to the 5D level. With a fiber laser at 1080 nm the excited atoms are photoionized. Ionization leads to depletion of the atomic density distribution observed by absorption imaging. The resonant ionization spectrummore » is reported. The setup used in this experiment is suitable not only to investigate mixtures of Bose-Einstein condensates and ions but also for single-atom detection on an atom chip.« less
  • We demonstrate spatially resolved, coherent excitation of Rydberg atoms on an atom chip. Electromagnetically induced transparency (EIT) is used to investigate the properties of the Rydberg atoms near the gold-coated chip surface. We measure distance-dependent shifts ({approx}10 MHz) of the Rydberg energy levels caused by a spatially inhomogeneous electric field. The measured field strength and distance dependence is in agreement with a simple model for the electric field produced by a localized patch of Rb adsorbates deposited on the chip surface during experiments. The EIT resonances remain narrow (<4 MHz) and the observed widths are independent of atom-surface distance downmore » to {approx} 20 {mu}m, indicating relatively long lifetime of the Rydberg states. Our results open the way to studies of dipolar physics, collective excitations, quantum metrology, and quantum information processing involving interacting Rydberg excited atoms on atom chips.« less
  • We describe the fabrication and construction of a setup for creating lattices of magnetic microtraps for ultracold atoms on an atom chip. The lattice is defined by lithographic patterning of a permanent magnetic film. Patterned magnetic-film atom chips enable a large variety of trapping geometries over a wide range of length scales. We demonstrate an atom chip with a lattice constant of 10 μm, suitable for experiments in quantum information science employing the interaction between atoms in highly excited Rydberg energy levels. The active trapping region contains lattice regions with square and hexagonal symmetry, with the two regions joined atmore » an interface. A structure of macroscopic wires, cutout of a silver foil, was mounted under the atom chip in order to load ultracold {sup 87}Rb atoms into the microtraps. We demonstrate loading of atoms into the square and hexagonal lattice sections simultaneously and show resolved imaging of individual lattice sites. Magnetic-film lattices on atom chips provide a versatile platform for experiments with ultracold atoms, in particular for quantum information science and quantum simulation.« less