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arXiv 1012.3048cond-mat.quant-gasquant-ph
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一维极限下的弱相互作用玻色气体

Weakly interacting Bose gas in the one-dimensional limit

P. Krüger, S. Hofferberth, I. E. Mazets, I. Lesanovsky, J. Schmiedmayer

摘要:

我们在一个微阱中制备了一种化学和热一维量子简并玻色气体。本文介绍了一种新的干涉方法来区分有限温度下热云中气体的准冷凝组分。当碰撞热化像预期的那样在1d内减慢时,我们的温度降到了$kT\approx 0.5\hbarω_\perp$(横振子本征频率$ω_\perp$)。在最低温度下,横向动量分布表现出对线密度$n_{1d}$的剩余依赖性,这是一维系统的特征。对于非常低的密度,接近横向单粒子基态是线性的$n_{1d}$。

英文摘要:

We prepare a chemically and thermally one-dimensional (1d) quantum degenerate Bose gas in a single microtrap. We introduce a new interferometric method to distinguish the quasicondensate fraction of the gas from the thermal cloud at finite temperature. We reach temperatures down to $kT\approx 0.5\hbarω_\perp$ (transverse oscillator eigenfrequency $ω_\perp$) when collisional thermalization slows down as expected in 1d. At the lowest temperatures the transverse momentum distribution exhibits a residual dependence on the line density $n_{1d}$, characteristic for 1d systems. For very low densities the approach to the transverse single particle ground state is linear in $n_{1d}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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