Optical pumping and relaxation of atomic population in assorted conditions

  title={Optical pumping and relaxation of atomic population in assorted conditions},
  author={Saptarshi Roy Chowdhury and Swarupananda Pradhan},
  journal={Journal of Physics B: Atomic, Molecular and Optical Physics},
  • S. ChowdhuryS. Pradhan
  • Published 31 January 2022
  • Physics
  • Journal of Physics B: Atomic, Molecular and Optical Physics
Precise control and knowledge over atomic dynamics is central to the advancement of quantum technology. The different experimental conditions namely, atoms in a vacuum, antirelaxation coated and buffer gas filled atomic cells provide complementary platforms for such investigations. The extent of changes in optical pumping, velocity changing collision and hyperfine changing collision rates associated with these conditions are discussed. There is a phenomenal change in the optical density by a… 
1 Citations

Angular Momentum Transfer at the Chemo-ionization and Spin Exchange Processes. Interaction between Spin Polarized Metastable Helium Atoms

In the collision of spin-polarized atoms, the transmission of electron polarization between colliding particles is possible. A similar situation occurs in a collision, for example, between alkali



Direct observation of atomic diffusion in warm rubidium ensembles

We present a robust method for measuring diffusion coefficients of warm atoms in buffer gases. Using optical pumping, we manipulate the atomic spin in a thin cylinder inside the cell. Then, we

High-Temperature Alkali Vapor Cells with Anti-Relaxation Surface Coatings

Antirelaxation surface coatings allow long spin relaxation times in alkali-metal cells without buffer gas, enabling faster diffusion of the alkali atoms throughout the cell and giving larger signals

Velocity diffusion and radiation trapping force in a one-dimensional expansion of cold atomic clouds in a magneto-optical trap

We experimentally investigate one-dimensional (1D) expansion of a cold cloud of cesium atoms in orthogonal 2D configuration of near resonant laser beams by temporally modulating a pair of

A subfemtotesla multichannel atomic magnetometer

A new spin-exchange relaxation-free (SERF) atomic magnetometer is described, and theoretical analysis shows that fundamental sensitivity limits of this device are below 0.01 fT Hz-1/2, which would enable new applications, including the possibility of mapping non-invasively the cortical modules in the brain.

Magnetoassisted pump–probe spectroscopy of cesium atoms

We studied the spectral behavior of a probe transmission in the presence of a counterpropagating pump beam for various laser polarizations and magnetic fields with and without the assistance of an

Observation of Bose-Einstein Condensation in a Dilute Atomic Vapor

A Bose-Einstein condensate was produced in a vapor of rubidium-87 atoms that was confined by magnetic fields and evaporatively cooled and exhibited a nonthermal, anisotropic velocity distribution expected of the minimum-energy quantum state of the magnetic trap in contrast to the isotropic, thermal velocity distribution observed in the broad uncondensed fraction.

Modulation induced splitting of the magnetic resonance

The splitting of magnetic resonance induced by a frequency modulated linearly polarized light field is presented for Hanle experimental configuration. The experiment is carried out with thermal

Non-negligible collisions of alkali atoms with background gas in buffer-gas-free cells coated with paraffin

We measured the rate of velocity-changing collisions (VCCs) between alkali atoms and background gas in buffer-gas-free anti-relaxation-coated cells. The average VCC rate in paraffin-coated rubidium

Magnetic field dependence of ultracold inelastic collisions near a feshbach resonance

Inelastic collision rates for ultracold 85Rb atoms in the F = 2, m(f) = -2 state have been measured as a function of magnetic field, and both two- and three-body losses are important.

Simultaneous Faraday filtering of the Mollow triplet sidebands with the Cs-D1 clock transition

A tailored Faraday anomalous dispersion optical filter based on the caesium-D1 transition for interfacing it with a resonantly pumped QD that enables a narrow-bandwidth (Δω=2π × 1 GHz) simultaneous filtering of both Mollow triplet sidebands.