UNIGE document Scientific Article
previous document  unige:36080  next document
add to browser collection

Modulation spectroscopy with ultracold fermions in an optical lattice

McCulloch, I. P.
Published in Physical Review. A. 2006, vol. 74, no. 4
Abstract We propose an experimental setup of ultracold fermions in an optical lattice to determine the pairing gap in a superfluid state and the spin ordering in a Mott-insulating state. The idea is to apply a periodic modulation of the lattice potential and to use the thereby induced double occupancy to probe the system. We show by full time-dependent calculation using the adaptive time-dependent density-matrix renormalization-group method that the position of the peak in the spectrum of the induced double occupancy gives the pairing energy in a superfluid and the interaction energy in a Mott insulator, respectively. In the Mott insulator we relate the spectral weight of the peak to the spin ordering at finite temperature using perturbative calculations.
Full text
(ISO format)
KOLLATH, Corinna et al. Modulation spectroscopy with ultracold fermions in an optical lattice. In: Physical Review. A, 2006, vol. 74, n° 4. https://archive-ouverte.unige.ch/unige:36080

170 hits



Deposited on : 2014-04-28

Export document
Format :
Citation style :