All conventional methods to laser-cool atoms rely on repeated cycles of optical pumping and spontaneous emission of a photon by the atom. Spontaneous emission in a random direction provides the dissipative mechanism required to remove entropy from the atom. However, alternative cooling methods have been proposed1,2 for a single atom strongly coupled to a high-finesse cavity; the role of spontaneous emission is replaced by the escape of a photon from the cavity. Application of such cooling schemes would improve the performance of atom–cavity systems for quantum information processing3,4. Furthermore, as cavity cooling does not rely on spontaneous emission, it can be applied to systems that cannot be laser-cooled by conventional methods; these include molecules2 (which do not have a closed transition) and collective excitations of Bose condensates5, which are destroyed by randomly directed recoil kicks. Here we demonstrate cavity cooling of single rubidium atoms stored in an intracavity dipole trap. The cooling mechanism results in extended storage times and improved localization of atoms. We estimate that the observed cooling rate is at least five times larger than that produced by free-space cooling methods, for comparable excitation of the atom.
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Horak, P., Hechenblaikner, G., Gheri, K. M., Stecher, H. & Ritsch, H. Cavity-induced atom cooling in the strong coupling regime. Phys. Rev. Lett. 79, 4974–4977 (1997)
Vuletić, V. & Chu, S. Laser cooling of atoms, ions, or molecules by coherent scattering. Phys. Rev. Lett. 84, 3787–3790 (2000)
Kuhn, A., Hennrich, M. & Rempe, G. Deterministic single-photon source for distributed quantum networking. Phys. Rev. Lett. 89, 067901 (2002)
Monroe, C. Quantum information processing with atoms and photons. Nature 416, 238–246 (2002)
Horak, P. & Ritsch, H. Dissipative dynamics of Bose condensates in optical cavities. Phys. Rev. A 63, 023603 (2001)
Mabuchi, H., Turchette, Q. A., Chapman, M. S. & Kimble, H. J. Real-time detection of individual atoms falling through a high-finesse optical cavity. Opt. Lett. 21, 1393–1395 (1996)
Münstermann, P., Fischer, T., Pinkse, P. W. H. & Rempe, G. Single slow atoms from an atomic fountain observed in a high-finesse optical cavity. Opt. Commun. 159, 63–67 (1999)
Sauer, J. A., Fortier, K. M., Chang, M. S., Hamley, C. D. & Chapman, M. S. Cavity QED with optically transported atoms. Preprint at 〈http://arXiv.org/quant-ph/0309052〉 (2003).
Hechenblaikner, G., Gangl, M., Horak, P. & Ritsch, H. Cooling an atom in a weakly driven high-Q cavity. Phys. Rev. A 58, 3030–3342 (1998)
Chan, H. W., Black, A. T. & Vuletić, V. Observation of collective-emission-induced cooling of atoms in an optical cavity. Phys. Rev. Lett. 90, 063003 (2003)
Nagorny, B., Elsässer, Th. & Hemmerich, A. Collective atomic motion in an optical lattice formed inside a high finesse cavity. Phys. Rev. Lett. 91, 153003 (2003)
Kruse, D., von Cube, C., Zimmermann, C. & Courtille, Ph. W. Observation of lasing mediated by collective atomic recoil. Preprint at 〈http://arXiv.org/quant-ph/0305033〉 (2003).
van Enk, S. J., McKeever, J., Kimble, H. J. & Ye, J. Cooling of a single atom in an optical trap inside a resonator. Phys. Rev. A 64, 013407 (2001)
Hood, C. J., Lynn, T. W., Doherty, A. C., Parkins, A. S. & Kimble, H. J. The atom-cavity microscope: single atoms bound in orbit by single photons. Science 287, 1447–1453 (2000)
Pinkse, P. W. H., Fischer, T., Maunz, P. & Rempe, G. Trapping an atom with single photons. Nature 404, 365–368 (2000)
Münstermann, P., Fischer, T., Maunz, P., Pinkse, P. W. H. & Rempe, G. Dynamics of single-atom motion observed in a high-finesse cavity. Phys. Rev. Lett. 82, 3791–3794 (1999)
Fischer, T., Maunz, P., Pinkse, P. W. H., Puppe, T. & Rempe, G. Feedback on the motion of a single atom in an optical cavity. Phys. Rev. Lett. 88, 163002 (2002)
Ye, Y., Vernooy, D. W. & Kimble, H. J. Trapping of single atoms in cavity QED. Phys. Rev. Lett. 83, 4987–4990 (1999)
McKeever, J. et al. State-insensitive cooling and trapping of single atoms in an optical cavity. Phys. Rev. Lett. 90, 133602 (2003)
Savard, T. A., O'Hara, K. M. & Thomas, J. E. Laser-noise-induced heating in far-off resonance optical traps. Phys. Rev. A 56, R1095–R1098 (1997)
Aspect, A., Dalibard, J., Heidmann, A., Salomon, C. & Cohen-Tannoudji, C. Cooling atoms with stimulated emission. Phys. Rev. Lett. 57, 1688–1691 (1986)
Dalibard, J. & Cohen-Tannoudji, C. Dressed-atom approach to atomic motion in laser light: the dipole force revisited. J. Opt. Soc. Am. B 2, 1707–1720 (1985)
Griessner, A., Jaksch, D. & Zoller, P. Cavity assisted nondestructive laser cooling of atomic qubits. Preprint 〈http://arXiv.org/quant-ph/0311054〉 (2003).
This work was partially funded by the German Science Foundation.
The authors declare that they have no competing financial interests.
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Maunz, P., Puppe, T., Schuster, I. et al. Cavity cooling of a single atom. Nature 428, 50–52 (2004). https://doi.org/10.1038/nature02387
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