@article{ISI:000332222100002, abstract = {Using a recently developed strong-coupling method, we present a comprehensive theory for doublon production processes in modulation spectroscopy of a three-dimensional system of ultracold fermionic atoms in an optical lattice with a trap. The theoretical predictions compare well to the experimental time traces of doublon production. For experimentally feasible conditions, we provide a quantitative prediction for the presence of a nonlinear ``two-photon″ excitation at strong modulation amplitudes.}, article-number = {21602}, author = {Dirks, Andreas and Mikelsons, Karlis and Krishnamurthy, H. R. and Freericks, J. K.}, doi = {10.1103/PhysRevA.89.021602}, eissn = {1094-1622}, issn = {1050-2947}, journal = {PHYSICAL REVIEW A}, month = {FEB 10}, number = {2}, orcid-numbers = {Mikelsons, Karlis/0000-0003-2540-0687 Freericks, James K/0000-0002-6232-9165}, researcherid-numbers = {Mikelsons, Karlis/C-9147-2015 Freericks, James K/D-7502-2011}, times-cited = {8}, title = {Theoretical description of coherent doublon creation via lattice modulation spectroscopy}, unique-id = {ISI:000332222100002}, volume = {89}, year = {2014} }