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Phys. Rev. Lett. 93, 040401 (2004) [4 pages]

Atomic Fermi-Bose Mixtures in Inhomogeneous and Random Lattices: From Fermi Glass to Quantum Spin Glass and Quantum Percolation

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A. Sanpera1,2, A. Kantian2, L. Sanchez-Palencia2, J. Zakrzewski3, and M. Lewenstein1,2
1Institut de Ciències Fotòniques, 08034 Barcelona, Spain
2Institut für Theoretische Physik, Universität Hannover, D-30167 Hannover, Germany
3Instytut Fizyki, Uniwersytet Jagielloński, PL-30-059 Kraków, Poland

Received 13 February 2004; published 20 July 2004

We investigate strongly interacting atomic Fermi-Bose mixtures in inhomogeneous and random optical lattices. We derive an effective Hamiltonian for the system and discuss its low temperature physics. We demonstrate the possibility of controlling the interactions at local level in inhomogeneous but regular lattices. Such a control leads to the achievement of Fermi glass, quantum Fermi spin-glass, and quantum percolation regimes involving bare and/or composite fermions in random lattices.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.040401
DOI:
10.1103/PhysRevLett.93.040401
PACS:
03.75.Kk, 03.75.Lm, 05.30.Jp, 64.60.Cn