PHYSICS/BK21 SEMINAR [5.7]

[ A theory vs. measurements in the so called trap states ]

* Speaker : Prof. Y-T Chough (Gwangju Univ)

* Place  : Physics Seminar Room (Science Bldg, 3-201)

* Date & Time : May, 7 (Fri)  3:00 ~ 4:00 pm

* Abstract

Since Filipowicz, Javanainen, and Meystre (FJM) reported a quantum theory

of the so called one-atom maser more than a score ago by now, variety of interesting

physics of the system have been discovered and cultivated in innumerable papers

and articles based upon this well-known model.

 One of the most vividly discussed issues among them is the so called trap states in

which the number (n) of photons excited in the resonator is locked to a certain number

regardless of the flux (N) of the pumping atomic beam.

 In this talk, however, I will show that it is by no means possible to directly reproduce

the n vs. N curve per se in its original shape predicted by the FJM model by any form of

measurement schemes one can think of - no matter, thoeretical or experimental.

 I will also show that these trap states are only mathematical virtuality rather than

physical reality that one can realize in practice unless one uses an artificial (appropriately

anti-bunched) beam of atoms instead of a natural (Poisson) beam. 

Contact Person : Prof. Yoon-Ho Kim (054-279-2093, yoonho@postech.ac.kr)