Nonadiabatic transport of cold atoms in a magnetic quadrupole potential

Dongyuan Chen; Haichao Zhang; Xinping Xu; Tang Li; Yuzhu Wang
March 2010
Applied Physics Letters;3/29/2010, Vol. 96 Issue 13, p134103
Academic Journal
We experimentally demonstrated the transport of cold atoms in a magnetic quadrupole trap in the nonadiabatic regime on the order of the trap period. The trap potential velocity was controlled by varying the currents of the two pairs of anti-Helmholtz coils. We efficiently transported cold atoms with two velocity regimes. For example, with a potential velocity of 18 (28 cm/s), the final velocity of a cold atom cloud is 0.6±2.7 (58.6±1.5 cm/s). The trap motion with proper velocity could expel energetic atoms from the trap, resulting in a decline in temperature of high residual velocity atoms.


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