Comparison of time profiles for the magnetic transport of cold atoms

Abstract

We have compared different time profiles for the trajectory of the centre of a quadrupole magnetic trap designed for the transport of cold sodium atoms. Our experimental observations show that a smooth profile characterized by an analytical expression involving the error function minimizes the transport duration while limiting atom losses and heating of the trapped gas. Using numerical calculations of single atom classical trajectories within the trap, we show that this observation can be qualitatively interpreted as a trade-off between two types of losses: finite depth of the confinement and Majorana spin flips.

Husimi-driven many-body systems realised with Bose-Einstein condensates

“…6 is bx = 0.85G/cm. rents between adjacent pairs of coils are sequenced [21][22][23]; (2) optical lattice methods [24]; or (3) translation of a rigid optical trap by various methods including optical tweezers [25][26][27], focus-tunable lenses [28], and translation of optics [29]. For fast transport tasks, spatial translation of rigid potentials has received the most attention, with the field of shortcuts to adiabaticity (STA) using invariant-based methods [30][31][32][33][34], reverse engineering [35], and control theory [36][37][38][39][40] to optimise rigid po-tential trajectories for high transport speed and minimal excitation.…”