Bose-Einstein Condensation in an electro-pneumatically transformed quadrupole-Ioffe magnetic trap

TL;DR

This paper introduces a novel electro-pneumatic method for transferring atoms into a magnetic trap to produce Bose-Einstein condensates, achieving high transfer efficiency and condensate size.

Contribution

It presents a new electro-pneumatic transfer technique for loading atoms into a magnetic trap, differing from conventional current-based methods.

Findings

Transfer efficiency exceeds 80%.

Achieved Bose-Einstein condensation with over 10^5 atoms.

Demonstrated a novel approach for atom transfer into magnetic traps.

Abstract

We report a novel approach for preparing a Bose-Einstein condensate (BEC) of $^{87}$Rb atoms using electro-pneumatically driven transfer of atoms into a Quadrupole-Ioffe magnetic trap (QUIC Trap). More than 5$\times$$10^{8}$ atoms from a Magneto-optical trap are loaded into a spherical quadrupole trap and then these atoms are transferred into an Ioffe trap by moving the Ioffe coil towards the center of the quadrupole coil, thereby, changing the distance between quadrupole trap center and the Ioffe coil. The transfer efficiency is more than 80 \%. This approach is different from a conventional approach of loading the atoms into a QUIC trap wherein the spherical quadrupole trap is transformed into a QUIC trap by changing the currents in the quadrupole and the Ioffe coils. The phase space density is then increased by forced rf evaporative cooling to achieve the Bose-Einstein condensation having more than $10^{5}$ atoms.