Atomic diffusion in an optical quasicrystal with five-fold symmetry

Physical Review A - Atomic, Molecular, and Optical Physics

Volumn 60, Issue 6, 1999, Pages R4233-R4236

  Guidoni, L ^a   Depret B ^a   di Stefano, A ^a   Verkerk, P ^a  

^a UNIVERSITÉ DES SCIENCES ET TECHNOLOGIES DE LILLE   (France)

Author keywords

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Indexed keywords

EID: 0000488031     PISSN: 10502947     EISSN: 10941622     Source Type: Journal    
DOI: 10.1103/PhysRevA.60.R4233     Document Type: Article

References (18)

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2. See, for instance, P. S. Jessen and I. H. Deutsch, in Advances in Atomic, Molecular, and Optical Physics 37, edited by B. Bederson and H. Walther (Academic Press, Cambridge, 1996), p. 95 and references therein.
3. C. Cohen-Tannoudji, in Fundamental Systems in Quantum Optics, Les Houches, Session LII, 1990, edited by J. Dalibard, J.-M. Raimond and J. Zinn-Justin (Elsevier Science, Amsterdam, 1992).
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6. See, for instance, Lectures on Quasicrystals, edited by F. Hippert and D. Gratias (Les Editions de Physique, Paris, 1994).
7. L. Guidoni, Ph.D. thesis, Université Pierre et Marie Curie, Paris, 1998 (unpublished).
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11. We have checked that this 2D configuration cools and traps the atoms 7. We have characterized it with pump-probe spectroscopy, but the atoms escape the interaction region too quickly to allow diffusion measurements.
12. R. Penrose, Bull. Inst. Math. Appl. 10, 266 (1974).
13. Y. Castin et al, Phys. Rev. A 50, 5092 (1994).
14. K.I. Petsas et al, Eur. Phys. J. D 6, 29 (1999).
15. From previous simulations in the periodic lattices 1316, we know that sometimes an atom escapes the lattice, acquiring a very high velocity, because of which the validity of the model is questionable. To avoid undesired divergences and to reproduce the experimental reality, we use an interaction region of 1 mm in diameter. If the atom reaches the border of this sphere, it is considered to be lost and its evolution is no longer evaluated.
16. S. Marksteiner et al, Phys. Rev. A 53, 3409 (1996).
17. These results are in strong contrast with those obtained from the numerical simulation of a periodic lattice created by four beams aligned along a regular tetrahedron. In that case, the temperature is anisotropic (by 20%) and the diffusion is isotropic 7.
18. The authors of Ref. 10 have also measured a second and much shorter characteristic time (Formula presented) instead of (Formula presented) in the autocorrelation. This time is associated with a small fraction of delocalized atoms that should also contribute to the diffusion.