搜索结果: 1-15 共查到“物理学 Rb”相关记录24条 . 查询时间(0.062 秒)
2020年，研究报道了一种新型层状kagome结构超导体，AV3Sb5 (A= K, Rb, Cs) 。这种AV3Sb5超导体因其独特的kagome结构而具有平带（flat band）、鞍点（saddle point）、以及具有线性色散关系的狄拉克点（Dirac point）等特殊的电子能带结构，展现出电子强关联、拓扑以及多体效应，很快成为研究几何阻挫、非平庸拓扑能带以及多种电子序耦合与竞争的重要...
Long timescale dynamics of spin textures in a degenerate F=1 $^{87}$ Rb spinor Bose gas
Long timescale dynamics spin textures Rb spinor Bose gas
2011/8/17
Abstract: We investigate the long-term dynamics of spin textures prepared by cooling unmagnetized spinor gases of F=1 $^{87}$Rb to quantum degeneracy, observing domain coarsening and a strong dependen...
A new limit on Lorentz-violating tensor interactions set using $^{21}$Ne-Rb-K comagnetometer
Lorentz-violating 21Ne-Rb-K comagnetometer
2011/8/29
We develop a comagnetometer using 21Ne atoms with nuclear spin I = 3=2 and Rb atoms polarized by spin-exchange with K atoms to search for tensor interactions that violate local Lorentz invariance.We f...
A New Rb Lamp Exciter Circuit for Rb atomic clocks and Studies on Transition from Ring to Red mode
Rb Lamp Exciter Circuit Rb atomic clocks
2010/11/16
In this paper we describe the development of novel RF exciter circuit for electrode less Rb lamp. The lamp exciter circuit is a RF oscillator with a a new configuration operating at 60 to 65 MHz freq...
Measurements of vector magnetic field using multiple electromagnetically induced transparency resonances in Rb vapor
magnetic field Rb vapor
2010/11/12
We study intensity distribution of transmission resonances under the conditions of electromagnetically induced transparency (EIT) with lin||lin configuration in 87Rb vapor. We demonstrate that for va...
Quantum interference in a four-level system of a $^{87}\mathrm{Rb}$ atom: Effects of spontaneously generated coherence
interference spontaneously generated coherence
2010/10/29
In this work, the effects of quantum interference and spontaneously generated coherence (SGC) are theoretically analyzed in a four level system of a $^{87}\mathrm{Rb}$ atom. For the effects of SGC, we...
Differential Light Shift Cancellation in a Magnetic-Field-Insensitive Transition of $^{87}$Rb
Differential Light Shift Cancellation Magnetic-Field-Insensitive Transition
2010/10/29
We demonstrate near-complete cancellation of the differential light shift of a two-photon magnetic-field-insensitive microwave hyperfine (clock) transition in $^{87}$Rb atoms trapped in an optical la...
Single Cs Atoms as Collisional Probes in a large Rb Magneto-Optical Trap
Single Cs Atoms Collisional Probes a large Rb Magneto-Optical Trap
2010/10/29
We study cold inter-species collisions of Caesium and Rubidium in a strongly imbalanced system with single and few Cs atoms. Observation of the single atom fuorescence dynamics yields insight into lig...
Antiferromagnetism in a bosonic mixture of rubidium ($^{87}$Rb) and potassium ($^{41}$K)
Antiferromagnetism bosonic mixture rubidium ($^{87}$Rb) potassium ($^{41}$K)
2010/10/27
We simulate the experimental possibility of observing the antiferromagnetic (AF) order in the
bosonic mixtures of rubidium (87Rb) and potassium (41K) in a two-dimensional optical lattice in
the pres...
Periodic spin textures in a degenerate F=1 $^{87}$Rb spinor Bose gas
Periodic spin textures degenerate F=1 $^{87}$Rb spinor Bose gas
2010/4/13
We report on the spin textures produced by cooling unmagnetized $^{87}$Rb F=1 spinor gases into the regime of quantum degeneracy. At low temperatures, magnetized textures form that break translational...
Rb(7S-5D)-H2,He能量转移截面与温度的关系
激光光谱 碰撞能量转移 荧光
2009/10/30
脉冲激光双光子激发Rb(5S)态到Rb(5D)或Rb(7S)态，在样品池条件下，利用原子荧光光谱方法测量了Rb(7S-5D)-H2,He碰撞能量转移截面与池温的关系。利用三能级模型的速率方程分析。通过测量在不同H2或He密度下的直接荧光与转移荧光的时间积分强度比，在353～493 K温度范围内得到了Rb(7S-5D)-H2,He的反应与非反应碰撞能量转移截面。对于Rb(7S)+H2→Rb(5D)+...
Rb-He光学碰撞中精细结构分支比的测量
激光光谱 光学碰撞 荧光
2009/10/30
脉冲激光激发Rb+He混合系统, 激光频率(ν)调离Rb(5Ｓ1/2)→Rb(5PJ)共振频率(νres)Δ(Δ＝ν-νres)。研究了光学碰撞Rb(5S1/2)+He+hν→Rb(5PJ)+He转移过程。激光激发RbHe分子态。RbHe激发态解离到5P1/2或5P3/2态，其布居数密度分别为n1和n2,定义分支比为n1/n2。为得到分支比，在-180 cm-1＜Δ＜200 cm-1范围内测量了I...
MEu(PO3)4 (M = Rb, Cs)的晶体结构研究
金属稀土磷酸盐 X射线衍射 晶体结构
2009/10/29
采用高温熔盐法合成了2个碱金属稀土磷酸盐MEu(PO3)4 (M=Rb,Cs)，用单晶X射线衍射技术确定其晶体结构．这2个晶体化合物是异质同构体，属于单斜晶系，空间群为P21/n (Z=4)．在该结构中，PO4螺旋双链与MO11和EuO8多面体相连接构成了一个三维的网络框架结构．
激发态Rb原子间的碰撞能量转移
激光光谱 碰撞能量合并 荧光
2009/10/29
脉冲激光器激发Rb原子到5P1/2态，通过碰撞能量转移Rb(5P1/2)+Rb(5S1/2)Rb(5P3/2)+Rb(5S1/2)产生5P3/2原子，研究了5P1/2+5P1/2,5P3/2+5P3/2,5P1/2+5P3/2的碰撞能量合并产生态的过程。5P1/2态原子密度利用Rb空心阴极灯通过光学吸收方法得到，而5P3/2态密度通过5P3/25S1/2(D2线)与5P1/25S1/2(D1线)跃...