Darmstadt 2008 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 47: Quantengase (Bosonen II / Fermionen)

Q 47.5: Vortrag

Donnerstag, 13. März 2008, 17:30–17:45, 1A

Fermion- and Spin-Counting in Strongly Correlated Systems — •Sibylle Braungardt¹, Aditi Sen¹, Ujjwal Sen¹, Roy J. Glauber², and Maciej Lewenstein¹ — ¹ICFO - Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain — ²Lyman Laboratory, Physics Department, Harvard University, 02138 Cambridge, MA, U.S.A.

We apply the atom counting theory to strongly correlated Fermi systems and spin models, which can be realized with ultracold atoms. The counting distributions are typically sub-Poissonian and remain smooth at quantum phase transitions, but their moments exhibit critical behavior, and characterize quantum statistical properties of the system. Moreover, more detailed characterizations are obtained with experimentally feasible spatially resolved counting distributions.