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arXiv:cond-mat/0611561 · Nature

Free fermion antibunching in a degenerate atomic Fermi gas released from an optical lattice

Tim Rom, Th. Best, D. van Oosten, Ulrich Schneider, Simon Fölling, B. Paredes, Immanuel Bloch

Published Dec 1, 2006• 266 citations
arXivHTMLPDF
DOI
10.1038/nature05319

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We propose a method to prepare fermionic atoms in a three-dimensional optical lattice at unprecedentedly low temperatures and uniform filling factors. The process involves adiabatic loading of degenerate atoms into multiple energy bands of an optical lattice followed by a filtering stage whereby atoms from all but the lowest band are removed. Of critical importance is the use of a nonharmonic trapping potential to provide external confinement for the atoms. For realistic experimental parameters, this procedure will produce a Fermi gas in a lattice with a reduced temperature T/TF 0.003T/{T}_{F}~0.003T/TF​ 0.003 and an entropy per particle of s 0.02kBs~0.02 {k}_{B}s 0.02kB​.