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Abstract

We designed and constructed a simplified experimental system to create a Bose-Einstein condensate in 87 Rb. Our system has several novel features including a mechanical atom transfer mechanism and a hybrid Ioffe-Pritchard magnetic trap. The apparatus has been designed to consistently produce a stable condensate even when it is not well optimized.

Measurement of the Casimir-Polder force through center-of-mass oscillations of a Bose-Einstein condensate

“…We briefly review the apparatus for generating condensates and measuring surface forces, as a more detailed description of the apparatus used to produce the condensate can be found in [14] and the technology and techniques for atom-surface measurements are described in detail in [15,16]. At the end of evaporation, nearly pure condensates (the fraction of atoms in the condensate ≥ 0.8) of 1.4 × 10 5 magnetically trapped 87 Rb atoms are created in the |F = 1, m F = −1 ground state.…”

Fast atomic transport without vibrational heating

“…Note that reaching a faithful final state is not incompatible with some transient excitation in the instantaneous basis at intermediate times, i.e., the process does not have to be slow (in the usual quantum mechanical jargon, "adiabatic"), although slowness is certainly a simple way to avoid heating, at least for ideal conditions. Efficient atom transport is a major goal for many applications such as quantum information processing in multiplexed trap arrays [1,2] or quantum registers [3]; controlled translation from the production (cooling) chamber to interaction or manipulation zones [4][5][6]; accurate control of interaction times and locations, e.g. in cavity QED experiments [7], quantum gates [8] or metrology [9]; and velocity control to launch [10], or stop atoms [11,12].…”

Magnetic merging of ultracold atomic gases ofRb85andRb87Händel1, Wiles2, Marchant3 et al. 2011Phys. Rev. A4030View full textAdd to dashboardCite

“…The gradient is then adiabatically increased to 160 G cm −1 before the trap is transported over 50 cm along the vacuum system in 2.5 s to an UHV glass cell. The magnetic transport [43,44] is achieved by mounting the quadrupole trap on a motorized translation stage (Parker 404 series) thtat has a positioning 053633-4 accuracy of 5 µm. Movement of the translation stage can be programmed to follow a variety of velocity profiles, with accurate control of the speed and acceleration.…”

“…Ultracold atoms are collected from a background vapor in a magneto-optical trap (MOT), loaded into a magnetic quadrupole trap (trap 1) and transported [43,44] from the MOT chamber to an UHV glass cell using a motorized translation stage [ Fig. 1(a)].…”