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Yuan-Fei Wei 《中国物理 B》2022,31(8):83102-083102
The dynamic polarizabilities of ${\rm 3s}^2\,^1{\rm S}_0$ and ${\rm 3s}{\rm 3p}\,^3{\rm P}_0^{\rm o}$ states of Al$^+$ are calculated using the hybrid configuration interaction and many-body perturbation theory method, and multiconfiguration Dirac-Hartree-Fock method in this work. Five ultraviolet magic wavelengths for the Al$^+$ clock transition ${\rm 3s}^2\,^1{\rm S}_0$-${\rm 3s3p}\,^3{\rm P}_0^{\rm o}$ are predicted. Although the suitable lasers are not available presently, the potential precision measurement on these magic wavelengths for the Al$^+$ clock transition would be used to extract the ratios of several certain transition matrix elements with high accuracy, and then help to improve the precision and reliability of the estimate of the BBR shift of the Al$^+$ clock transition. The differential dynamic polarizabilities at certain wavelengths are evaluated, which are useful to assess the ac Stark shift of the Al$^+$ clock transition frequency and helpful in the clock experiments to suppress the ac Stark shift of the clock transition as possible as it can.  相似文献   
2.
我们研究了不同烧结次数的单相氧化物超导体 YBa_2Cu_3O_(9-x)(x 2)超导体的AC磁化率随温度的变化.发现在低于Tc后磁化率曲线大致可分为随温度线性变化(占10K 温度范围)的陡降区和平缓的尾巴区。并对此提出了定性的解释。  相似文献   
3.
We determine the static values of the scalar and tensor dipole polarizabilities of the ground, 6s6p~3P_0~o, and 6s6p~3P_1~o states of the Yb atom. These results can be useful in many experiments undertaken using this atom. We employed a combined configuration interaction(CI) method and a second-order many-body perturbation theory(MBPT) to evaluate energies and electric dipole(E1) matrix elements of many low-lying excited states of the above atom. These values are compared with the other available theoretical calculations and experimental values. By combining these E1 matrix elements with the experimental excitation energies, we estimate the dominant valence correlation contributions to the dipole polarizabilities of the above states. The core contribution is obtained from the finite field approach. We also compare these values with the other theoretical results as there are no precise experimental values that are available for these properties.  相似文献   
4.
本文报道在氧化物超导体YBa_2Cu_3O_(9-x)(x~2)上进行的单电子隧道效应研究的初步结果。我们观察到在一阶导数曲线上51mV和43mV处有峰,并研究了这些峰的能量位置随温度的变化。在氧化物超导体内存在能隙的前提下,提出了能隙各向异性的假设来说明我们的实验结果。  相似文献   
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