Multilevel Spin Dynamics in Time-Dependent External Magnetic Field

2006 ◽  
Vol 26 (1-2) ◽  
pp. 47-54
Author(s):  
Péter Földi ◽  
Mihály G. Benedict ◽  
Francois M. Peeters
1991 ◽  
Vol 44 (12) ◽  
pp. 3906-3910 ◽  
Author(s):  
Z. F. Ezawa ◽  
M. Hotta ◽  
A. Iwazaki

2015 ◽  
Vol 29 (35n36) ◽  
pp. 1550247
Author(s):  
Xiao-Meng Liang ◽  
Guo-Qiao Zha

In this paper, based on the time-dependent Ginzburg–Landau theory, we study the dynamics of vortex–antivortex (V–Av) pairs in a mesoscopic superconducting square with a small hole under applied bias currents. For the sample with a centered hole, a V–Av pair can nucleate at the hole edges and moves in opposite directions perpendicular to applied constant DC drive. The influence of the external magnetic field on the (anti)vortex velocity and the lifetime of V–Av pairs is mainly investigated. Different modes in the dynamical process of the V–Av collision and annihilation are identified. Moreover, in the case when the hole is displaced from the center of the square, the V–Av dynamics behaves quite differently from the symmetric case due to the shift of the V–Av creation point.


2011 ◽  
Author(s):  
K. L. Litvinenko ◽  
M. A. Leontiadou ◽  
Juerong Li ◽  
E. T. Bowyer ◽  
S. K. Clowes ◽  
...  

2010 ◽  
Vol 24 (17) ◽  
pp. 1869-1875
Author(s):  
ZHAO-XIAN YU ◽  
ZHI-YONG JIAO ◽  
XIANG-GUI LI

By using the Lewis–Riesenfeld invariant theory, we have studied the geometric phase in the condensed vapor of Rb under pressure and external time-dependent magnetic field. We find that the geometric phase in the cycle case has nothing to do with the coupling constant between electron and atomic nucleus, and the external time-dependent magnetic field.


2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Cristian Aguirre-Tellez ◽  
Miryam Rincón-Joya ◽  
José José Barba-Ortega

In this paper, we studied the power dissipation process of a Shubnikov vortex-antivortex pair in a mesoscopic superconducting square sample with a concentric square defect in presence of an oscillatory external magnetic field. The time-dependent Ginzburg-Landau equations and the diffusion equation were numerically solved. The significant result is that the thermal dissipation is associated with a sizeable relaxation of the superconducting electrons, so that the power released in this kind of process might become calculated as a function of the time. Also, we analyzed the effect that the Ginbzurg-Landau κand deformation τparameters have on the magnetization, dissipate power and super-electrons density.


2015 ◽  
Vol 91 (10) ◽  
Author(s):  
M. Ali-Akbari ◽  
F. Charmchi ◽  
A. Davody ◽  
H. Ebrahim ◽  
L. Shahkarami

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