scholarly journals EFFECT OF ORDER-PARAMETER COLLECTIVE MODES ON NMR AND ULTRASOUND ATTENUATION IN 3He-A

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-6-C6-8
Author(s):  
L. Tewordt ◽  
N. Schopohl
Keyword(s):  
Order Parameter ◽  
Collective Modes ◽  
Ultrasound Attenuation

Collective modes in superconducting films with a periodic modulation of the order parameter

Physica B+C ◽  
1981 ◽  
Vol 107 (1-3) ◽  
pp. 165-166
Author(s):  
I.M. Dmitrenko ◽  
Yu.G. Bevza ◽  
A.V. Lukashenko
Keyword(s):  
Order Parameter ◽  
Superconducting Films ◽  
Collective Modes ◽  
Periodic Modulation

Elementary Excitations of a Trapped Bose Gas at Zero Temperature

1997 ◽  
Vol 11 (28) ◽  
pp. 3305-3310
Author(s):  
S. Stringari
Keyword(s):  
Experimental Data ◽  
Order Parameter ◽  
Bose Gas ◽  
Collective Modes ◽  
Recent Experimental Data ◽  
Zero Temperature ◽  
Elementary Excitations

Starting from the equations of Gross–Pitaevskii for the order parameter we investigate the collective modes of a trapped Bose-condensed gas. These excitations are analogous to the propagation of phonons in homogeneous Bose superfluids. The coupling between the monopole and quadrupole vibrations in a deformed trap is explicitly investigated and the predictions are successfully compared with recent experimental data.

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