Efficient vibrational state coupling in an optical tilted-washboard potential via multiple spatial translations and application to pulse echo

Details Efficient vibrational state coupling in an optical tilted-washboard potential via multiple spatial translations and application to pulse echo Efficient vibrational state coupling in an optical tilted-washboard potential via multiple spatial translations and application to pulse echo

2007-06-21

arxiv.org/abs/0706.3072v2

Phys. Rev. A 77, 022303 (2008)

Physics

Quantum Physics

13 pages, 18 figures

Scientific paper

10.1103/PhysRevA.77.022303

We measure the application of simple and compound pulses consisting of time-dependent spatial translations to coupling vibrational states of ultracold 85Rb atoms in a far-detuned 1D optical lattice. The lattice wells are so shallow as to support only two bound states, and we prepare the atoms in the ground state. The lattice is oriented vertically, leading to a tilted-washboard potential analogous to those encountered in condensed-matter systems. Experimentally, we find that a square pulse consisting of lattice displacements and a delay is more efficient than single-step and Gaussian pulses. This is described as an example of coherent control. It is striking that contrary to the intuition that soft pulses minimize loss, the Gaussian pulse is outperformed by the square pulse. Numerical calculations are in strong agreement with our experimental results and show the superiority of the square pulse to the single-step pulse for all lattice depths and to the Gaussian pulse for lattice depths greater than 7 lattice recoil energies. We also compare the effectiveness of these pulses for reviving oscillations of atoms in vibrational superposition states using the pulse-echo technique. We find that the square and Gaussian pulses result in higher echo amplitudes than the single-step pulse. These improved echo pulses allow us to probe coherence at longer times than in the past, measuring a plateau which has yet to be explained. In addition, we show numerically that the vibrational state coupling due to such lattice manipulations is more efficient in shallow lattices than in deep lattices.

Affiliated with

Also associated with

No associations

Rating

Efficient vibrational state coupling in an optical tilted-washboard potential via multiple spatial translations and application to pulse echo does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Efficient vibrational state coupling in an optical tilted-washboard potential via multiple spatial translations and application to pulse echo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Efficient vibrational state coupling in an optical tilted-washboard potential via multiple spatial translations and application to pulse echo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-192343