scholarly journals Retracted: Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle Mn12

2015 ◽  
Vol 2015 ◽  
pp. 1-1
Keyword(s):  
Quadrupole Excitation ◽  
Tunnel Splitting

scholarly journals Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Yousef Yousefi ◽  
Khikmat Kh. Muminov
Keyword(s):  
Magnetic Field ◽  
Spin System ◽  
Easy Axis ◽  
Second Order ◽  
Transverse Anisotropy ◽  
Quadrupole Excitation ◽  
Tunnel Splitting

We analyze the interference between tunneling paths that occur for a spin system with special Hamiltonian both for dipole and quadrupole excitations. Using an instanton approach, we find that as the strength of the second-order transverse anisotropy is increased, the tunnel splitting for both excitations is modulated, with zeros occurring periodically and the number of quenching points for quadrupole excitation decreasing. This effect results from the interference of four tunneling paths connecting easy-axis spin orientations and occurs in the absence of any magnetic field.

Four-wave mixing in potassium involving quadrupole excitation and emission

1991 ◽  
Vol 8 (9) ◽  
pp. 1846 ◽  
Author(s):  
S. G. Dinev ◽  
G. B. Hadjichristov ◽  
I. L. Stefanov
Keyword(s):  
Four Wave Mixing ◽  
Wave Mixing ◽  
Quadrupole Excitation

Peculiarity of the charge-exchange quadrupole excitation in nuclei

1987 ◽  
Vol 35 (4) ◽  
pp. 1439-1441 ◽  
Author(s):  
R. Leonardi ◽  
E. Lipparini ◽  
S. Stringari
Keyword(s):  
Charge Exchange ◽  
Quadrupole Excitation
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