Journal ArticleDOI
Plancks Gesetz und Lichtquantenhypothese
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In this article, the authors describe how the Phasenraum eines Lichtquants in bezug auf ein gegebenes Volumen wird in „Zellen“ von der Grose h3 aufgeteilt, i.e., the Zahl der moglichen Verteilungen der Lichtquanten einer makroskopisch definierten Strahlung unter diese Zellen liefert die Entropie.Abstract:
Der Phasenraum eines Lichtquants in bezug auf ein gegebenes Volumen wird in „Zellen“ von der Grose h3 aufgeteilt. Die Zahl der moglichen Verteilungen der Lichtquanten einer makroskopisch definierten Strahlung unter diese Zellen liefert die Entropie und damit alle thermodynamischen Eigenschaften der Strahlung.read more
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Dissertation
A tunable Bose-Einstein condensate for quantum interferometry
TL;DR: In this paper, the authors used BECs for atom interferometry and achieved sub-Doppler cooling for the first time for this species and achieved condensation via evaporation in an optical dipole trap taking advantage of a Feshbach resonance.
Journal ArticleDOI
Effective action and field equation for BEC from weak to strong couplings
TL;DR: In this paper, a double-fractional generalization of the Gross Pitaevskii equation is proposed to describe the strong coupling limit of a nonlinear self-interacting Schr?dinger equation, where the particle orbits perform L?vy walks rather than Gaussian random walks.
Journal ArticleDOI
Effects of zero mode and thin spectrum on the life time of atomic Bose Einstein condensates
TL;DR: In this paper, the ground state evolution of coherent and squeezed coherent ground states in a double well potential was studied and the effect of the states we use on the free energy vanishes in the thermodynamic limit.
Posted ContentDOI
Path Integral based Non-equilibrium Quantum Field Theory of Non-relativistic Pairs inside an Environment
TL;DR: In this paper, the authors derive differential equations from path-integral based non-equilibrium quantum field theory, that cover the dynamics and spectrum of non-relativistic two-body fields for any environment.
Journal ArticleDOI
Statistical physics of Bose-Einstein condensation
TL;DR: In this article, a progress in understanding of statistical properties of a quantum degenerate Bose gas was made, showing how the Maxwell demon ensemble helps to compute fluctuations of the Bose-Einstein condensate of ideal Bose gases according to the microcanonical ensemble.