Optical ramsey fringes in two-photon spectroscopy

M. M. Salour

J. J. Snyder, J. Helmcke, M. Gläser +1 more

J. Helmcke, S. A. Lee, J. L. Hall

Alexander S. Zibrov, Andrey B. Matsko

We utilize a two-photon polarization spectroscopy technique to observe Ramsey fringes that appear due to light scattering by coherently prepared rubidium atoms. We examine the effect in a vapor cell for spatially and temporally separated laser fields. We present a theoretical interpretation of the experimental results.

Berthold‐Georg Englert, HERBERT WALTHER, Marlan O. Scully

Hiromitsu Imai, Atsuo Morinaga

Ramsey spectroscopy and geometric operations on the released sodium Bose–Einstein condensates consisting of 10 7 atoms were demonstrated using copropagating two-photon stimulated Raman pulses, which were resonant to the clock transition between the F =1, m F =0 and F =2, m F =0 states of sodium atoms. The Ramsey fringes with a visibility close to 1 were obtained for two Raman pulses separated by 10 ms. A relative frequency resolution of Ramsey resonance was 6×10 -10 and a phase uncertainty of fringes was 0.06 rad for single measurement. Using resonant laser-controlled Raman pulses, geometric operations for rotations of the two-level Bose–Einstein condensates around axes 2 and 3 on the Bloch sphere were also demonstrated with a relative phase uncertainty of 4%.