Bose-Einstein Condensates in Rotating Traps and Optical ... - BEC

156 Sound propagation in presence of a one-dimensional optical lattice
∆n
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 1 2 3 4 5 6 7 8
bTP /w
Figure 11.11: The signal amplitude ∆n as a function of the barrier parameter bTP /w at gn =
0.5ER. Dashed lines: s =0measured at t = 100¯h/ER (upper dashed line) and t = 200¯h/ER
(lower dashed line). Solid lines: s =15measured at t = 100, 200, 300, 400¯h/ER for s =15.
The corresponding four lines exactly overlap.
∆n(˜gnm ∗ π 2 /2mER) 1/2
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0 1 2 3 4 5 6 7 8
bTP /w
Figure 11.12: Same data as in Fig. 11.11. The amplitudes are rescaled to demonstrate the
universal behavior in the linear regime.