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Abstract: We propose a method to prepare a sample of fermionic atoms in athree-dimensional 3D optical lattice at unprecedentedly low temperatures anduniform filling factors. The process involves adiabatic loading of atoms intomultiple energy bands of an optical lattice followed by a filtering stagewhereby atoms from all but the ground band are removed. Of critical importanceis the use of a non-harmonic trapping potential, taken here to be the radialprofile of a high-order Laguerre-Gaussian laser beam, to provide externalconfinement for the atoms. For realistic experimental parameters, thisprocedure should produce samples with temperatures $\sim10^{-3}$ of the Fermitemperature. This would allow the investigation of the low-temperature phasediagram of the Fermi-Hubbard model as well as the initialization of ahigh-fidelity quantum register.



Autor: J. R. Williams, J. H. Huckans, R. W. Stites, E. L. Hazlett, K. M. O'Hara

Fuente: https://arxiv.org/







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