Physics – Condensed Matter – Quantum Gases
Scientific paper
2012-02-21
Physics
Condensed Matter
Quantum Gases
5 pages, 3 figures
Scientific paper
Repulsive interactions between particles on a lattice may lead to bound states, so called doublons. Such states may be created by dynamically tuning the interaction strength, e.g. using a Feshbach resonance, from attraction to repulsion. We study the doublon production efficiency as a function of the tuning rate at which the on-site interaction is varied. An expectation based on the Landau- Zener law suggests that exponentially few doublons are created in the adiabatic limit. Contrary to such an expectation, we found that the number of produced doublons scales as a power law of the tuning rate with the exponent dependent on the dimensionality of the lattice. The physical reason for this anomaly is the effective decoupling of doublons from the two-particle continuum for center of mass momenta close to the corners of the Brillouin zone. The study of doublon production may be a sensitive tool to extract detailed information about the band structure.
Kamenev A. A.
Schecter Michael
No associations
LandOfFree
Forming doublons by a quantum quench 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 Forming doublons by a quantum quench, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Forming doublons by a quantum quench will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-413573