München 2004 – scientific programme
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Q: Quantenoptik und Photonik
Q 25: Quanteneffekte II
Q 25.5: Talk
Tuesday, March 23, 2004, 17:45–18:00, HS 218
Phase-Control of Collective Quantum Dynamics — •Jörg Evers1, Mihai Macovei1,2, and Christoph H. Keitel1 — 1Theoretische Quantendynamik, Fakultät für Mathematik und Physik, Universität Freiburg, Hermann-Herder-Str. 3, D-79104 Freiburg im Breisgau — 2Institute of Applied Physics, Academiei str. 5., MD-2028 Chisinau, Moldova
Ever since the classic work by Dicke [1], the concept of collectivity for dipole-interacting atoms confined in a region of the order of a typical optical wavelength has received considerable attention. However for possible applications, convenient schemes are required to control the atoms. In this talk, we present a control scheme based on the manipulation of the relative phase between the driving laser fields [2] for a collection of three-level atoms in V- or Λ- configuration [3]. For larger samples, the phase is shown to be a convenient parameter to rapidly populate or depopulate completely a trapping state of the ensemble. Increasing the number of atoms leads to a more rapid transfer of the atoms into the trapping states or vice versa. As applications, we discuss fluorescence and absorption properties of the atoms and a possible setup for a fast optical switching device controlled by the relative phase.
[1] R. H. Dicke, Phys. Rev. 93, 99 (1954).
[2] M. A. G. Martinez et al., Phys. Rev. A. 55, 4483 (1997), E. Paspalakis and P. L. Knight, Phys. Rev. Lett. 81, 293 (1998).
[3] M. Macovei, J. Evers and C. H. Keitel, Phys. Rev. Lett. 91, 233601 (2003).