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利用发展的调制俘获损耗荧光光谱技术实验测量了超冷铯分子0u+(6P3/2)长程态的高灵敏光缔合光谱. 光谱探测范围较国际已有报道扩大了60 cm-1, 观察到25个长程区域新的振动能级. 通过LeRoy-Bernstein公式对振动束缚能数据进行拟合, 获得了超冷铯分子0u+(6P3/2)态的长程系数C3 为16.103±0.010. 构建了超冷铯分子0u+(6P3/2)态长程区域的势能曲线. 相似文献
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We report a highly efficient three-dimensional degenerated Raman sideband cooling(3D dRSC) that enhances the loading of a magnetically levitated optical dipole trap, and observe the strong atom loss due to the three-body recombination.The 3D dRSC is implemented to obtain 5×107 Cs atoms with the temperature of ~ 480 nK. The cold temperature enables 1.8×107 atoms loaded into a crossed dipole trap with an optimized excessive levitation magnetic gradient. Compared to the loadin... 相似文献
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分析了一个新的复杂的四维混沌系统的基本特性,该系统每个方程中包含一个三次交叉乘积项,共有9个平衡点,它们相对于原点和坐标轴具有完美的对称性,并且相对于线性特性和不变流形具有很好的相似性.描述了两个同时共存的对称双翼吸引子.最后,设计了一个模拟电路来实现这个新的四维混沌系统,表明数值仿真和电路实现具有很好的一致性,同时说明在应用上由于频率不同导致的仿真与物理实现之间的重要区别.
关键词:
四维混沌系统
Lyapunov 指数
共存双翼吸引子
电路实现 相似文献
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Highly sensitive photoassociation spectroscopy of ultracold ~(23)Na~(133)Cs molecular long-range states below the 3S_(1/2)+6P_(3/2)limit 下载免费PDF全文
We present high resolution photoassociation spectroscopy of ultracold~(23)Na~(133)Cs molecules in a long-range c~3Σ~+state below the(3 S_(1/2)+ 6 P_(3/2)) asymptote. We perform photoassociation spectroscopy in a dual-species magneto-optical trap(MOT) and detect the photoassociation resonances using trap-loss spectroscopy. By fitting the experimental data with the semi-classical Le Roy–Bernstein formula, we deduce the long-range molecular coefficient C6 and derive the empirical potential energy curve in the long-range region. 相似文献
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本文主要介绍碳-12为原子量的标准及碳-12标准的国际原子量较之原来的国际原子量的变动情况如何。为了说明这些问题,本文拟就下列几点作简要讨论和介绍:(1)两种原子量标准的共存;(2)统一两种原子量标准的必要性;(3)在什么基础上将两种原子量标准统一起来;(4)采用碳-12=12为统一的原子量标准。 相似文献
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We develop a research of spin currents in a 23Na spinor Bose-Einstein condensate (BEC) by applying a magnetic field gradient. The spin current is successfully induced by the spin-dependent force arising from the magnetic field gradient. The dynamics of the spin components under the magnetic force is investigated. The study is promising to be extended to produce a longer spin-coherence and to enhance the sensitivity of the spin-mixing interferometry in a spinor BEC. 相似文献
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High-resolution photoassociation spectroscopy of ultracold Cs2 long-range 0-g state: The external well potential depthHigh-resolution photoassociation spectroscopy of ultracold Cs2 long-range 0-g state: The external well potential depthHigh-resolution photoassociation spectroscopy of ultracold Cs2 long-range 0-g state: The external well potential depth 下载免费PDF全文
High-resolution photoassociation spectroscopy is reported using a modulation spectroscopy technology in a cesium atomic magneto-optical trap. The two lowest vibrational levels have been experimentally observed which have been theo- retically predicted in [Phys. Rev. A 75 052501 (2007)]. A new potential curve is obtained by using the Rydberg-Klein-Ress method with a well depth of -82,384 + 0,026 cm-1, which is deeper than the result of previous experiment (-77.909 cm-1) and the theoretical prediction (-81.6445 cm- l ). 相似文献
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High-resolution photoassociation spectroscopy of ultracold Cs2 long-range 0g- state:The external well potential depth 下载免费PDF全文
High-resolution photoassociation spectroscopy is reported using a modulation spectroscopy technology in a cesium atomic magneto-optical trap. The two lowest vibrational levels have been experimentally observed which have been theoretically predicted in [Phys. Rev. A 75 052501(2007)]. A new potential curve is obtained by using the Rydberg–Klein–Ress method with a well depth of 82.384±0.026 cm-1, which is deeper than the result of previous experiment( 77.909 cm-1) and the theoretical prediction( 81.6445 cm-1). 相似文献
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Enhancement of signal-to-noise ratio of ultracold polar NaCs molecular spectra by phase locking detection 下载免费PDF全文
We report a method of high-sensitively detecting the weak signal in photoassociation(PA) spectra of ultracold NaCs molecules by phase sensitive-demodulated trap-loss spectra of Na atoms from a photomultiplier tube. We find that the signal-to-noise ratio(SNR) of the PA spectra is strongly dependent on the integration time and the sensitivity of the lockin amplifier, and our results show reasonable agreement with the theoretical analyses of the SNR with the demodulation parameters. Meanwhile, we investigate the effect of the interaction time of the PA laser with the colliding Na–Cs atom pairs on the SNR of the PA spectra. The atom loss rate is dependent on both the PA-induced atom loss and the loading of the MOT. The high-sensitive detection of the excited ultracold NaCs molecules lays a solid foundation for further study of the formation and application of ultracold NaCs molecules. 相似文献