Journal ArticleDOI
Plancks Gesetz und Lichtquantenhypothese
TLDR
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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Journal ArticleDOI
Transition from the Bose–Einstein condensate to the Berezinskii–Kosterlitz–Thouless phase
TL;DR: In this article, a phase diagram for a trapped two-dimensional ultracold Bose gas was obtained and a critical temperature above which the free energy of a state with a pair of vortices of opposite circulation is lower than that for a vortex-free Bose-Einstein condensed ground state was found.
DissertationDOI
Bose-Einstein condensates in magnetic double well potentials
TL;DR: In this article, the authors present two realizations of magnetic double well potentials for Bose-Einstein condensates (BECs) on atom chips, one approach utilizes static magnetic traps, created by current carrying micro wires, manipulating the atoms close to the chip surface, and the second approach combines static magnetic trap with oscillating magnetic fields and realizes a double well in the emerging adiabatic dressed potential.
Journal ArticleDOI
Exactly solvable models in atomic and molecular physics
Angela Foerster,Eric Ragoucy +1 more
TL;DR: In this article, integrable generalized models of the superalgebra gl (M | N ) were constructed in the context of atomic and molecular physics, most of them related to different types of Bose-Einstein condensates.
Journal ArticleDOI
Local existence of solutions to randomized Gross-Pitaevskii hierarchies
TL;DR: Chen et al. as discussed by the authors studied the local-in-time existence of solutions to randomized forms of the Gross-Pitaevskii hierarchy on periodic domains, and showed that the truncation argument can be used to estimate the Duhamel expansions.
Journal ArticleDOI
Density functional theory of the inhomogeneous Bose-Einstein condensate
TL;DR: In this article, a new bosonic density functional was proposed for the alkali atom Bose gas, together with the corresponding Kohn-Sham equation, which provides the simplest theory of the observed inhomogeneous Bose-Einstein condensate, beyond the level of mean field theory.