Efficient quantum state preparation using Stern-Gerlach effect on cold atoms

Abstract

The Zeeman hyperfine state dependent force in a Stern-Gerlach (SG) experiment has been exploited to separate and detect atoms having different Zeeman hyperfine states in a cold atom cloud. Utilizing this SG technique, we have made the quantitative estimate of atoms in different Zeeman hyperfine states in an atom cloud, which has been helpful in optimizing the optical pumping of atoms for efficient preparation of atomic state. Employing an optimized optical pumping, nearly $92\%$ of cold ${}^{87}Rb$ atoms from a grey magneto-optical trap (G-MOT) on atom-chip have been optically pumped to the trappable Zeeman hyperfine state $|F=2,m_F=+2⟩$. These optically pumped atoms have been trapped in an Ioffe-Pritchard magnetic trap near the atom-chip surface.

References in corpus (13)

• Atom Interferometers
• Optical Confinement of a Bose-Einstein Condensate
• Bose-Einstein Condensation in a Surface Micro Trap
• Guiding Neutral Atoms
• A Beam Splitter for Guided Atoms on an Atom Chip
• Guiding neutral atoms around curves with lithographically patterned current-carrying wires
• Fifteen Years of Cold Matter on the Atom Chip: Promise, Realizations, and Prospects
• Realization of a complete Stern-Gerlach interferometer: Towards a test of quantum gravity
• T^3-Stern-Gerlach Matter-Wave Interferometer
• Challenges to miniaturizing cold atom technology for deployable vacuum metrology
• On loading of a magneto-optical trap on an atom-chip with U-wire quadrupole field
• On continuous loading of a U-magneto-optical trap (U-MOT) on atom-chip in ultra high vacuum
• Quantum Stern-Gerlach experiment and path entanglement of Bose-Einstein condensate