Bose-Einstein model parameters

Table 3.5. Best-model parameters of the temperature-dependent phonon mode shift in Fig. 3.11b, calculated by (3.22) (Bose-Einstein model) [43]...

Table 3.13. Parameters of the temperature dependence of Eq according to the Varshni and Bose-Einstein model for ZnO single crystal bulk samples...

Because the first models of the physics of superconductivity were based on the phenomenon of Bose-Einstein condensation (BEC) it is not surprising that the existence of the Josephson effect has also been postulated for cold-atom systems in the BEC state [11]. In both superconductors and BEC cold-atom systems, the Josephson effect arises from the approximation of non-conservation of particle number, which gives rise to a phase type of order parameter F(x) and concomitant wave phenomena, described at T = 0 by the Gross-Pitaevski equation " ... 

Figure 4. The bridging between Bose-Einstein condensation in the low-density, weak interaction region and in the high-density, strong interaction region [124, 125]. Data for Tc/r , where is the critical temperature and T is the critical temperature in an ideal Bose-Einstein gas, were calculated from quantum path integral Monte-Carlo simulations for a hard-sphere many-boson model [124, 125], The effective dimensionless interaction parameter is pa, where p is the density and CT is the hard-core sphere diameter. The two open circles (o) represent experimental data for bulk liquid He.

The bosonic order parameter may be, as a first approximation, set to unity, (i/ (r)) = 1, within the Tisza s phenomenological two-fluid model of Bose-Einstein condensation [100] ... 

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