14 papers
Ultra-precise measurement of optical frequency ratios
Jörn Stenger, Harald Schnatz, Christian Tamm +1
We developed a novel technique for frequency measurement and synthesis, based on the operation of a femtosecond comb generator as transfer oscillator. The technique can be used to…
Kerr-lens mode-locked lasers as transfer oscillators for optical frequency measurements
Harald R. Telle, Burghard Lipphardt, Jörn Stenger
We introduce a novel concept for optical frequency measurement and division which employs a Kerr-lens mode-locked laser as a transfer oscillator whose noise properties do not enter…
Phase-coherent frequency measurement of the Ca intercombination line at 657 nm with a Kerr-lens mode-locked femtosecond laser
J. Stenger, T. Binnewies, G. Wilpers +5
The frequency of the Calcium ^3P_1--^1S_0 intercombination line at 657 nm is phase-coherently measured in terms of the output of a primary cesium frequency standard using an optica…
Flavor Decomposition of the Polarized Quark Distributions in the Nucleon from Inclusive and Semi-inclusive Deep-inelastic Scattering
K. Ackerstaff, The HERMES Collaboration
Spin asymmetries of semi-inclusive cross sections for the production of positively and negatively charged hadrons have been measured in deep-inelastic scattering of polarized posit…
Quantum tunneling across spin domains in a Bose-Einstein condensate
D. M. Stamper-Kurn, H. -J. Miesner, A. P. Chikkatur +3
Quantum tunneling was observed in the decay of metastable spin domains in gaseous Bose-Einstein condensates. A mean-field description of the tunneling was developed and compared wi…
Bragg spectroscopy of a Bose-Einstein condensate
J. Stenger, S. Inouye, A. P. Chikkatur +3
Properties of a Bose-Einstein condensate were studied by stimulated, two-photon Bragg scattering. The high momentum and energy resolution of this method allowed a spectroscopic mea…