Emergence of superfluid transport in a dynamical system of ultracold atoms

The dynamics of a Bose-Einstein condensate is studied theoretically in a combined periodic plus harmonic external potential. Different dynamical regimes of stable and unstable collective dipole and Bloch oscillations are analysed in terms of a quantum mechanical pendulum model. Nonlinear interactions are shown to counteract quantum-mechanical dephasing and lead to phase-coherent, superfluid transport

M. M. Marmaduke and others

35-1Indian AffairsReport : Memorial of M. Marmaduke. [965] Pawnee depredations in 1828; treaties of 1825 and 1833.1858-9

The low energy spectrum of finite size metallic SWNTs

The electronic spectrum of metallic finite-size single-wall carbon nanotubes at low energies is derived. It is based on a tight-binding description for the interacting p_{z} electrons. Not only the forward scattering parts of the Coulomb interaction, which are diagonalized by bosonization, are considered, but also all other processes becoming relevant for small diameter tubes. As a consequence of the substructure of the underlying lattice, a spin 1 triplet is found as ground state if the exchange splitting is larger than the branch mismatch, a spin 0 singlet otherwise. Moreover the excitation spectrum is calculated

Josephson oscillation of a superfluid Fermi gas

Using the complete numerical solution of a time-dependent three-dimensional mean-field model we study the Josephson oscillation of a superfluid Fermi gas (SFG) at zero temperature formed in a combined axially-symmetric harmonic plus one-dimensional periodic optical-lattice (OL) potentials after displacing the harmonic trap along the axial OL axis. We study the dependence of Josephson frequency on the strength of the OL potential. The Josephson frequency decreases with increasing strength as found in the experiment of Cataliotti et al. [Science 293 (2001) 843] for a Bose-Einstein condensate and of the experiment of Pezze et al. [Phys. Rev. Lett. 93 (2004) 120401] for an ideal Fermi gas. We demonstrate a breakdown of Josephson oscillation in the SFG for a large displacement of the harmonic trap. These features of Josephson oscillation of a SFG can be tested experimentally.Comment: 7 pages, 10 figure

Trust funds and unexpended balances. Letter from the Acting Secretary of the Treasury, with accompanying schedules, in response to a resolution of the House calling for information concerning trust funds and unexpended balances in the custody of the several departments

49-1Ways and MeansTrust Funds and Unexpected Balances. [2403] Indian trust funds in the custod y of the Treasurer of the U.S.; list of tribes, and amounts in their accounts.1886-21

var. aromatica

Rhus aromatica Aiton var. aromaticaRhus trilobatasouthfacing coulee slope Lethbridge, University of Lethbridge campu

officinale

Taraxacum officinale F.H. Wiggerscommon dandelion;dandelionpissenlit officinalTaraxacum officinaleNear Chico State College greenhouse195 fee

hastata

Populus trichocarpa Torrey & A. Grayblack cottonwood;western balsam poplarpeuplier de l'Ouest;peuplier baumier de l'OuestN. side Bow River below Bassano Damtreed terrace2600 feetP. trichocarpa & deltoide