Motion Bose-Einstein condensate

Chapters 7 and 8 discuss spin and identical particles, respectively, and each chapter introduces an additional postulate. The treatment in Chapter 7 is limited to spin one-half particles, since these are the particles of interest to chemists. Chapter 8 provides the link between quantum mechanics and statistical mechanics. To emphasize that link, the ffee-electron gas and Bose-Einstein condensation are discussed. Chapter 9 presents two approximation procedures, the variation method and perturbation theory, while Chapter 10 treats molecular structure and nuclear motion. 

A newly discovered, highly organized state of matter in which clusters of 20-30 component atoms are magnetically contained and adiabatically cooled to within 2-3 X 10 K of absolute zero. At this point, the motions of the contained atoms are overcome by very weak cohesive forces of the Bose-Einstein condensate. While of no apparent relevance to biochemical kinetics, the Bose-Einstein condensate represents one of the most perfect forms of self-assembly, inasmuch as aU atoms within the condensate share identical Schrodinger wave equations. 

In the third paper, Nonexponential motional damping of impurity atoms in Bose-Einstein condensate, the propagation of impurity atoms is considered in BEC. For atom velocities superior to that of condensate phonons, the thermal-isation rate of the condesate is not high enough to allow Markovian relaxation and the motional damping of the atoms is predicted to deviate from exponential. This is also a manifestation of non-mean-field effects in the condensate since the mean-field theories yield exponential decay for the motion of impurity atoms. Measurement of the motional decay rate should, therefore, provide a way for observing non-mean-field effects in the condensate. 

NON-EXPONENTIAL MOTIONAL DAMPING OF IMPURITY ATOMS IN BOSE-EINSTEIN CONDENSATES... 

Abstract We demonstrate that the damping of the motion of an impurity atom injected at a supercritical velocity into a Bose-Einstein condensate can exhibit appreciable deviations from the exponential law on time scales of 10 r s. 

Motional damping of impurity atoms in Bose-Einstein condensates... 

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