UNIGE document Scientific Article
previous document  unige:36069  next document
add to browser collection

Spectroscopy of Ultracold Atoms by Periodic Lattice Modulations

Hofstetter, W.
Schollwöck, U.
Published in Physical Review Letters. 2006, vol. 97, no. 5
Abstract We present a nonperturbative analysis of a new experimental technique for probing ultracold bosons in an optical lattice by periodic lattice depth modulations. This is done using the time-dependent density-matrix renormalization group method. We find that sharp energy absorption peaks are not unique to the Mott insulating phase at commensurate filling but also exist for superfluids at incommensurate filling. For strong interactions, the peak structure provides an experimental measure of the interaction strength. Moreover, the peak height of the peaks at ℏω≳2U can be employed as a measure of the incommensurability of the system.
Full text
(ISO format)
KOLLATH, Corinna et al. Spectroscopy of Ultracold Atoms by Periodic Lattice Modulations. In: Physical Review Letters, 2006, vol. 97, n° 5. https://archive-ouverte.unige.ch/unige:36069

176 hits



Deposited on : 2014-04-28

Export document
Format :
Citation style :