[PDF] Top 20 High temperature Bose-Einstein condensation

... Bose-Einstein condensation (BEC) was predicted right after the introduction of Bose statistics ...in high-energy collision are of the MeV ...BEC temperature in atomic gases, T C ... See full document

... voltage) to observe the BEC. Moreover, the author shows that the ultra-low temperature is not a necessary condition to verify the existence of BEC. This paper is interesting and certainly deserves publication in ... See full document

... this theory has problem with 7 Li gas because a<o. This leads to imaginary physical quantities of the gas. This is unphysical, this tells that BEC of 7 Li dilute gas is impossible. Using the theoretical formalism ... See full document

... When the number of atoms in the trap increases, the eigen frequencies of the coupled equations (3) and (4) approaches an asymptotic value. The new regime is achieved when the condition Na / a ho >>1 is achieved. In ... See full document

... the high particle num ber limit (see Stringari ...is high enough so that the Thomas-Fermi approximation is valid, then the ex­ citation frequency should not depend on the particle ... See full document

... 10 ', a massive increase, but still seven orders of magnitude away from degeneracy. The MOT is vital for confining and cooling atoms from a room temperature sam- ple. However, the configuration that yields the ... See full document

... FIG. 2. Measured and calculated microcavity input-output characteristics (high-effective-gain mode in red, low-effective- gain mode in gray). The injection current I is proportional to the pump rate P. Here, ... See full document

... small changes on the mV level were made to the offset control of the AOM driver’s AM. Such a change would not have a significant effect on U (t) at high or intermediate powers, but would effectively make the ... See full document

... polariton Bose condensation in a GaAs microcavity with embedded ...sufficiently high densities of nonreso nant excitation by picosecond light pulses, there are two stages in the dynamics of the total ... See full document

... Sensing extreme low-intensity radiation fields in the quantum regime requires high- efficiency, low-noise detectors. In the case of the optical wavelength range, single-photon detectors are widely available. The ... See full document

... of Bose- Einstein condensation in dilute gases [1–3], the properties and possible applications of condensates in various situ- ations have been ... See full document

... a high density object can have a large optical depth (depending on absorption cross section), causing a vast amount of intensity ...as high densities are required to keep the critical temperature ... See full document

... of condensation was predicted in 1925 by Einstein, on the basis of a paper by Bose: for a gas of non interacting particles, below a certain temperature, there is a phase transition where a ... See full document

... laser-induced high energy reservoir polaritons have thermalized via polariton- polariton interactions, and cooled down through polariton-phonon interactions [Deng 10] , near the bottleneck (highly excitonic lower ... See full document

... continuous Bose- Einstein distribution shown in ...the Bose-Einstein condensate and the low-energy polariton modes would lead then to the reconstruction of the polariton spectrum as predicted ... See full document

... at temperature close to the absolute zero, due to its inhomogeneity, and despite the very dilute nature of the gases, the atom-atom interactions, when taken into account in the model, can lead to density in the ... See full document

... critical temperature for Bose-Einstein condensation of the atom- molecule mixture at the fixed total atomic density, one studies the effective atom-molecular theory 1,2 ... See full document

... We show how the phase profile of Bose-Einstein condensates can be engineered through its in- teraction with localized Rydberg excitations. The interaction is made controllable and long-range by ... See full document

... In 1981, Unruh [79] presented one such analogy, between curved space-time and superfluid flow. He showed that there exists an equivalence between the equations governing the behaviour of a sound wave propagating in a ... See full document

... We investigate the destiny of a gray soliton in a repulsive one-dimensional Bose-Einstein condensate undergoing a sudden quench of the non-linearity parameter. The outcome of the quench is found to depend ... See full document