Zobrazeno 1 - 10
of 453
pro vyhledávání: '"Coddington I"'
We demonstrate a high-accuracy dual-comb spectrometer centered at 3.4 \mu m. The amplitude and phase spectra of the P, Q, and partial R-branch of the methane {\nu}3 band are measured at 25 MHz to 100 MHz point spacing with ~kHz resolution and a signa
Externí odkaz:
http://arxiv.org/abs/1110.1401
Two frequency combs can be used to measure the full complex response of a sample in a configuration which can be alternatively viewed as the equivalent of a dispersive Fourier transform spectrometer, infrared time domain spectrometer, or a multiheter
Externí odkaz:
http://arxiv.org/abs/1001.3865
Publikováno v:
Phys. Rev. A 74, 023623 (2006)
A Bose-Einstein condensate (BEC) is a quantum fluid that gives rise to interesting shock wave nonlinear dynamics. Experiments depict a BEC that exhibits behavior similar to that of a shock wave in a compressible gas, eg. traveling fronts with steep g
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603389
Publikováno v:
Phys. Rev. Lett. 93, 210403 (2004)
We observe interlaced square vortex lattices in rotating two-component dilute-gas Bose-Einstein condensates (BEC). After preparing a hexagonal vortex lattice in a single-component BEC in an internal state $|1>$ of $^{87}$Rb atoms, we coherently trans
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410237
Publikováno v:
Phys. Rev. Lett. 94, 080404 (2005)
Repulsive laser potential pulses applied to vortex lattices of rapidly rotating Bose-Einstein condensates create propagating density waves which we have observed experimentally and modeled computationally to high accuracy. We have observed a rich var
Externí odkaz:
http://arxiv.org/abs/cond-mat/0407343
We characterize several equilibrium vortex effects in a rotating Bose-Einstein condensate. Specifically we attempt precision measurements of vortex lattice spacing and the vortex core size over a range of condensate densities and rotation rates. Thes
Externí odkaz:
http://arxiv.org/abs/cond-mat/0405240
We create rapidly rotating Bose-Einstein condensates in the lowest Landau level, by spinning up the condensates to rotation rates $\Omega>99%$ of the centrifugal limit for a harmonically trapped gas, while reducing the number of atoms. As a consequen
Externí odkaz:
http://arxiv.org/abs/cond-mat/0308582
Publikováno v:
Phys.Rev.Lett.91:100402,2003
We directly image Tkachenko waves in a vortex lattice in a dilute-gas Bose-Einstein condensate. The low (sub-Hz) resonant frequencies are a consequence of the small but nonvanishing elastic shear modulus of the vortex-filled superfluid. The frequenci
Externí odkaz:
http://arxiv.org/abs/cond-mat/0305008
We study the formation of large vortex aggregates in a rapidly rotating dilute-gas Bose-Einstein condensate. When we remove atoms from the rotating condensate with a tightly focused, resonant laser, the density can be locally suppressed, while fast c
Externí odkaz:
http://arxiv.org/abs/cond-mat/0301532
Publikováno v:
Phys.Rev.Lett.89:100403,2002
We have studied the dynamics of large vortex lattices in a dilute-gas Bose-Einstein condensate. While undisturbed lattices have a regular hexagonal structure, large-amplitude quadrupolar shape oscillations of the condensate are shown to induce a weal
Externí odkaz:
http://arxiv.org/abs/cond-mat/0204449