Detecting multi-atomic composite states in optical lattices

Abstract

We propose and discuss methods for detecting quasi-molecular complexes which are expected to form in strongly interacting optical lattice systems. Particular emphasis is placed on the detection of composite fermions forming in Bose-Fermi mixtures. We argue that, as an indirect indication of the composite fermions and a generic consequence of strong interactions, periodic correlations must appear in the atom shot noise of bosonic absorption images, similar to the bosonic Mott insulator [S. Fölling, et al., Nature {\bf 434}, 481 (2005)]. The composites can also be detected directly and their quasi-momentum distribution measured. This method -- an extension of the technique of noise correlation interferometry [E. Altman et al., Phys. Rev. A {\bf 79}, 013603 (2004)] -- relies on measuring higher order correlations between the bosonic and fermionic shot noise in the absorption images. However, it fails for complexes consisting of more than three atoms.

9 revtex pages

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Cited by in corpus (11)

• Multi-particle composites in density-imbalanced quantum fluids
• Coherent shift of localized bound pair in Bose Hubbard model
• Detection of Pair-Superfluidity for bosonic mixtures in optical lattices
• Density correlations in ultracold atomic Fermi gases
• Sudden death of particle-pair Bloch oscillation and unidirectional propagation in a one-dimensional driven optical lattice
• Perfect coherent shift of bound pairs in strongly correlated systems
• Fast transfer and efficient coherent separation of bound cluster in the extended Hubbard model
• Density correlations in ultracold Fermi systems within the exact Richardson solution
• Quench field sensitivity of two-particle correlation in a Hubbard model
• Topological quantum slinky motion in resonant extended Bose-Hubbard model
• Formations of generalized Wannier-Stark ladders: Theorem and applications