scholarly journals Elementary Excitations in Trapped Bose-Einstein Condensed Gases Beyond the Mean-Field Approximation

1998 ◽  
Vol 81 (21) ◽  
pp. 4541-4544 ◽  
Author(s):  
L. Pitaevskii ◽  
S. Stringari
Keyword(s):  
Mean Field ◽  
Field Approximation ◽  
Mean Field Approximation ◽  
Elementary Excitations ◽  
The Mean ◽  
Bose Einstein

ENTANGLEMENT DYNAMICS OF FLUCTUATIONS IN TWO-MODE BOSE–EINSTEIN CONDENSATES

2010 ◽  
Vol 24 (25) ◽  
pp. 2571-2580
Author(s):  
P. L. SHU ◽  
L. C. WANG ◽  
X. X. YI
Keyword(s):  
Time Evolution ◽  
Mean Field ◽  
Field Approximation ◽  
Mean Field Approximation ◽  
Entanglement Dynamics ◽  
Weakly Coupled ◽  
Tunneling Transition ◽  
The Mean ◽  
Bose Einstein ◽  
Double Well Potential

The entanglement dynamics of fluctuations in two weakly coupled Bose–Einstein condensates (BECs) is studied in this paper. By calculating the time evolution of entanglement between two fluctuations of condensates in a double-well potential, we show that the nonlinear tunneling transition can be reflected in the entanglement dynamics of fluctuations in BECs. This complements the study on the entanglement dynamics of BECs based on the mean-field approximation.

scholarly journals DAMPING IN TWO-COMPONENT BOSE GAS

2014 ◽  
Vol 28 (04) ◽  
pp. 1450029 ◽  
Author(s):  
ARANYA B. BHATTACHERJEE
Keyword(s):  
Mean Field ◽  
Field Approximation ◽  
Bose Gas ◽  
The Other ◽  
Mean Field Approximation ◽  
Collective Modes ◽  
Elementary Excitations ◽  
Two Component ◽  
Atom Interaction ◽  
The Mean

In this paper, we investigate the Landau and Baliaev damping of the collective modes in a two-component Bose gas using the mean-field approximation. We show that due to the two body atom–atom interaction, oscillations of each component is coupled to the thermal excitations of the other component which gives rise to creation or destruction of the elementary excitations that can take place in the two separate components. In addition, we find that the damping is also enhanced due to inter-component coupling.

Decay of a Bose-Einstein condensate in a dissipative lattice – the mean-field approximation and beyond

2011 ◽  
Vol 63 (1) ◽  
pp. 63-71 ◽  
Author(s):  
F. Trimborn ◽  
D. Witthaut ◽  
H. Hennig ◽  
G. Kordas ◽  
T. Geisel ◽  
...  
Keyword(s):  
Mean Field ◽  
Field Approximation ◽  
Einstein Condensate ◽  
Mean Field Approximation ◽  
Bose Einstein Condensate ◽  
The Mean ◽  
Bose Einstein
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