| Records |
| Author |
Omar, A.; Anantharamaiah, K. R.; Rupen, M.; Rigby, J. |
| Title |
VLA detection of OH absorption from the elliptical galaxy NGC 1052 |
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Journal Article |
| Year |
2002 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
| Volume |
381 |
Issue  |
1 |
Pages |
L29-L32 |
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0004-6361 |
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RPLAB @ s @ |
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435 |
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Kawamura, J.; Hunter, T. R.; Tong, C. Y. E.; Blundell, R.; Papa, D. C.; Patt, F.; Peters, W.; Wilson, T.; Henkel, C.; Goltsman, G.; Gershenzon, E. |
| Title |
Ground-based terahertz CO spectroscopy towards Orion |
Type |
Journal Article |
| Year |
2002 |
Publication |
A&A |
Abbreviated Journal |
A&A |
| Volume |
394 |
Issue |
1 |
Pages |
271-274 |
| Keywords |
HEB mixers, applications |
| Abstract |
Using a superconductive hot-electron bolometer heterodyne receiver on the 10-m Heinrich Hertz Telescope on Mount Graham, Arizona, we have obtained velocity-resolved 1.037 THz CO () spectra toward several positions along the Orion Molecular Cloud (OMC-1) ridge. We confirm the general results of prior observations of high-J CO lines that show that the high temperature, , high density molecular gas, , is quite extended, found along a ~ region centered on BN/KL. However, our observations have significantly improved angular resolution, and with a beam size of we are able to spatially and kinematically discriminate the emission originating in the extended quiescent ridge from the very strong and broadened emission originating in the compact molecular outflow. The ridge emission very close to the BN/KL region appears to originate from two distinct clouds along the line of sight with and ≈ . The former component dominates the emission to the south of BN/KL and the latter to the north, with a turnover point coincident with or near BN/KL. Our evidence precludes a simple rotation of the inner ridge and lends support to a model in which there are multiple molecular clouds along the line of sight towards the Orion ridge. |
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no |
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322 |
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| Author |
Gisin, Nicolas; Ribordy, Grégoire; Tittel, Wolfgang; Zbinden, Hugo |
| Title |
Quantum cryptography |
Type |
Journal Article |
| Year |
2002 |
Publication |
Reviews of Modern Physics |
Abbreviated Journal |
Rev. Mod. Phys. |
| Volume |
74 |
Issue |
1 |
Pages |
145-195 |
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0034-6861 |
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no |
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506 |
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Uzawa, Y.; Miki, S.; Wang, Z.; Kawakami, A.; Kroug, M.; Yagoubov, P.; Kollberg, E. |
| Title |
Performance of a quasi-optical NbN hot-electron bolometric mixer at terahertz frequencies |
Type |
Journal Article |
| Year |
2002 |
Publication |
Superconductor Science and Technology |
Abbreviated Journal |
Supercond. Sci. Technol. |
| Volume |
15 |
Issue |
1 |
Pages |
141-145 |
| Keywords |
HEB, mixer |
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0953-2048 |
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no |
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RPLAB @ s @ |
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548 |
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| Author |
Deang, Jennifer; Du, Qiang; Gunzburger, Max D. |
| Title |
Modeling and computation of random thermal fluctuations and material defects in the Ginzburg–Landau model for superconductivity |
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Journal Article |
| Year |
2002 |
Publication |
J. Comp. Phys. |
Abbreviated Journal |
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| Volume |
181 |
Issue |
1 |
Pages |
45-67 |
| Keywords |
noise; superconductivity; finite element methods; fluctuations. |
| Abstract |
It is well known that thermal fluctuations and material impurities affect the motion of vortices in superconductors. These effects are modeled by variants of a time-dependent Ginzburg-Landau model containing either additive or multiplicative noise. Numerical computations are presented that illustrate the effects that noise has on the dynamics of vortex nucleation and vortex motion. For an additive noise model with relatively low variances, it is found that the vortices form a quasi-steady-state lattice in which the vortex core sizes remain roughly fixed but their positions vibrate. Two multiplicative noise models are considered. For one model having relatively long-range order, the sizes of the vortex cores vary in time and from one vortex to another. Finally, for the additive noise case, we show that as the variance of the noise tends to zero, solutions of the stochastic time-dependent Ginzburg-Landau equations converge to solutions of the corresponding equations with no noise. |
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RPLAB @ gujma @ |
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758 |
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