Journal ArticleDOI
Observation of Bose-Einstein Condensation in a Dilute Atomic Vapor
TLDR
A Bose-Einstein condensate was produced in a vapor of rubidium-87 atoms that was confined by magnetic fields and evaporatively cooled and exhibited a nonthermal, anisotropic velocity distribution expected of the minimum-energy quantum state of the magnetic trap in contrast to the isotropic, thermal velocity distribution observed in the broad uncondensed fraction.Abstract:
A Bose-Einstein condensate was produced in a vapor of rubidium-87 atoms that was confined by magnetic fields and evaporatively cooled. The condensate fraction first appeared near a temperature of 170 nanokelvin and a number density of 2.5 x 10 12 per cubic centimeter and could be preserved for more than 15 seconds. Three primary signatures of Bose-Einstein condensation were seen. (i) On top of a broad thermal velocity distribution, a narrow peak appeared that was centered at zero velocity. (ii) The fraction of the atoms that were in this low-velocity peak increased abruptly as the sample temperature was lowered. (iii) The peak exhibited a nonthermal, anisotropic velocity distribution expected of the minimum-energy quantum state of the magnetic trap in contrast to the isotropic, thermal velocity distribution observed in the broad uncondensed fraction.read more
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The weakly bound ground state of the LiHe2 triatomic system
I. Baccarelli,Gerardo Delgado-Barrio,F. A. Gianturco,Tomás González-Lezana,Salvador Miret-Artés,Pablo Villarreal +5 more
TL;DR: In this paper, the location and spatial shape for the ground bound state of a triatomic system that contains one lithium (6Li or 7Li) atom and two boson helium partners were investigated.
Journal ArticleDOI
Magneto-optical trap for sodium atoms operating on the D1 line
J. Flemming,A.M. Tuboy,Débora Marcondes Bastos Pereira Milori,Luís Gustavo Marcassa,Sérgio Carlos Zílio,V. S. Bagnato +5 more
TL;DR: In this article, the authors report on the observation of magneto-optical trapping of sodium atoms in the 3 S 1 2 → 3 P 1 2 transition (D 1 line).
Journal ArticleDOI
Atom optics with hollow optical systems
Heung-Ryoul Noh,Wonho Jhe +1 more
TL;DR: In this paper, the dark hollow region where atoms can be manipulated in a way so as to minimize the external perturbations due to the optical fields once the atoms are cooled and trapped.
Posted Content
High order exponential integrators for nonlinear Schr\"odinger equations with application to rotating Bose-Einstein condensates
TL;DR: The authors perform a change of unknown so that the rotation term disappears and they obtain a nonautonomous nonlinear Schrodinger equation, and consider exponential integrators such as exponential Runge–Kutta methods and Lawson methods.
References
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Proceedings Article
Bose-Einstein condensation in a gas of sodium atoms
TL;DR: The striking signature of Bose condensation was the sudden appearance of a bimodal velocity distribution below the critical temperature of ~2µK.
Journal ArticleDOI
Trapping of neutral sodium atoms with radiation pressure
TL;DR: The confinement and cooling of an optically dense cloud of neutral sodium atoms by radiation pressure was reported, provided by three retroreflected laser beams propagating along orthogonal axes, with a weak magnetic field used to distinguish between the beams.
Journal ArticleDOI
Plancks Gesetz und Lichtquantenhypothese
TL;DR: 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.
Journal ArticleDOI
Observation of atoms laser cooled below the Doppler limit
Paul D. Lett,Richard N. Watts,Christoph I Westbrook,William D. Phillips,Phillip L. Gould,Harold Metcalf +5 more
TL;DR: This "Doppler cooling limit" results from the minimization of the detuning-dependent temperature at low laser power1.
Journal ArticleDOI
Output Coupler for Bose-Einstein Condensed Atoms
TL;DR: In this paper, an output coupler for Bose condensed atoms in a magnetic trap was demonstrated, where short pulses of rf radiation were used to create Bose condensates in a superposition of trapped and untrapped hyperfine states.