Fig. 1
From: Ramsey interferometry with trapped motional quantum states
Experimental configuration for a Ramsey Interferometer in a V0 = 10Er lattice. a The BEC is divided into discrete pancakes in yz plane by an 1-dimensional optical lattice along x axis with a lattice constant d = 426 nm. b Band energies for the S-band and the D-band. c Wave-functions for the S-band and the D-band. The widths of the bands are shown by the area with0.08Er and 3.57Er, respectively. The band gap between S and D at q = 0 is 7.77Er. d Time sequences for the Ramsey interferometry. The atoms are first loaded into the S-band of OL, followed by the RI sequence: π/2 pulse, holding time t OL , and the second π/2 pulse. The dashed line indicates the time when the second π/2 pulse begins. The lattice is not shut down. Finally, band mapping is used to detect the atom number in the different bands. e The used pulse sequences designed by an optimised shortcut method
