Hannover 2003 – wissenschaftliches Programm
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Q: Quantenoptik
Q 9: Quanteneffekte 1
Q 9.8: Vortrag
Montag, 24. März 2003, 15:45–16:00, F107
Decoherence of a continuously driven No-dqSchrödinger cat in cavity QED — •Pavel Lougovski1, Berthold-Georg Englert1,2, Enrique Solano1,3, and Herbert Walther1 — 1Max-Planck-Institut für Quantenoptik,Hans-Kopfermann-Strasse 1, 85748 Garching, Germany — 2Department of Physics , National University of Singapore, 2 Science Drive 3, Singapore 117542 — 3Sección Física, Depto. de Ciencias, Pontificia Universidad Católica del Perú, Apartado 1761, Lima, Peru
We study the dissipative dynamics of a continuously driven No-dqSchrödinger cat atom-field state in cavity QED systems [1]. Our model consists of a lossy cavity coupled to a two-level atom which is driven by a strong external resonant field. We show that the atom-field dynamics arising from the competition between the pumping and decoherence processes yield, unexpectedly, a completely solvable model. Even though, the steady-state is diagonal in the atom-field density matrix, we find that the continuous pumping decreases the typical decay rate of the off-diagonal terms. These results apply to the microwave as well as to the optical regime. [1] E. Solano, G. S. Agarwal, and H. Walther, to be published in Phys. Rev. Letters (quant-ph/0202071).