Bragg spectroscopy of discrete axial quasiparticle modes in a cigar-shaped degenerate Bose gas

We propose an experiment in which long wavelength discrete axial quasiparticle modes can be imprinted in a 3D cigar-shaped Bose-Einstein condensate by using two-photon Bragg scattering experiments, similar to the experiment at the Weizmann Institute [J. Steinhauer {\em et al.}, Phys. Rev. Lett. {\bf 90}, 060404 (2003)] where short wavelength axial phonons with different number of radial modes have been observed. We provide values of the momentum, energy and time duration of the two-photon Bragg pulse and also the two-body interaction strength which are needed in the Bragg scattering experiments in order to observe the long wavelength discrete axial modes. These discrete axial modes can be observed when the system is dilute and the time duration of the Bragg pulse is long enough.Comment: 5 pages, 3 figures, title, abstract, results changed, references added. to appear in The European Physical Journal

Scheikundig Onderzoek van Eenige Op Java Voorkomende Minerale Watern.

v. ; 27 cm.Publication suspended Mar. 1942-May 1946

Petition of a number of citizens of the State of Alabama, praying to be allowed pre-emption rights to any unlocated public lands, in lieu of others of which they have been deprived

25-3Petition of Alabama Citizens. [339] Creek treaty of 18321839-1

VU TSPMI ĮTEIKĖ MAGISTRO DIPLOMUS DAR VIENAI LIETUVIŠKŲ IR TARPTAUTINIŲ PROGRAMŲ ABSOLVENTŲ KARTAI

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Accumulation of chromium metastable atoms into an Optical Trap

We report the fast accumulation of a large number of metastable 52Cr atoms in a mixed trap, formed by the superposition of a strongly confining optical trap and a quadrupolar magnetic trap. The steady state is reached after about 400 ms, providing a cloud of more than one million metastable atoms at a temperature of about 100 microK, with a peak density of 10^{18} atoms.m^{-3}. We have optimized the loading procedure, and measured the light shift of the 5D4 state by analyzing how the trapped atoms respond to a parametric excitation. We compare this result to a theoretical evaluation based on the available spectroscopic data for chromium atoms.Comment: 7 pages, 5 Figure

Message from the President of the United States, transmitting a communication from the Secretary of the Interior, with a draft of a bill to accept and ratify an agreement with the Crow Indians for the sale of a portion of their reservation in the Territory of Montana required for the Northern Pacific Railroad.

47-1Indian AffairsCrow Indian Reservation. [1987] Bill to ratify the agreement of 23 Aug. 1881; sale of reservation lands in Montana which are needed by the Northern Pacific Railroad.1882-1