2026-09-22T04:57:23Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/82942022-01-13T07:54:41Zcom_1721.1_7582com_1721.1_7581col_1721.1_131022
Michael S. Feld.
Fang-Yen, Christopher Minwah, 1973-
Massachusetts Institute of Technology. Dept. of Physics.
Massachusetts Institute of Technology. Department of Physics
2005-08-23T18:58:19Z
2005-08-23T18:58:19Z
2002
2002
http://hdl.handle.net/1721.1/8294
50421610
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2002.
Includes bibliographical references (p. 263-270).
This thesis describes a study of a cavity QED microlaser in which many atoms are present simultaneously and atom-cavity interaction is well-defined. The microlaser is found to display multiple thresholds analogous to first-order phase transitions of the cavity field. Hysteresis is observed as a function of atom-cavity detuning and number of atoms. Data is compared with a rate equation model and fully quantized treatment based on micromaser theory. Good agreement between theory and experiment is found when the cavity is resonant with atoms of the most probable velocity, but long lifetimes of metastable states preclude the observation of true steady-state transition points. For nonzero atom-cavity detuning the microlaser displays broadenings and shifts which are not yet well-understood. Quantum trajectory simulations are performed to investigate many-atom and finite transit time effects in the microlaser. We show that over a wide range of parameters the many-atom microlaser scales with the single-atom theory, with a perturbation in the photon statistics due to cavity decay during the atom transit time.
by Christopher Minwah Fang-Yen.
Ph.D.
270 p.
13348649 bytes
13348402 bytes
application/pdf
application/pdf
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Physics.
Multiple thresholds and many-atom dynamics in the cavity QED microlaser
Thesis
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