Polytechnique Strongly - correlated ultracold atoms in optical lattices
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Travelling to exotic places with ultracold atoms
We review and speculate on two recent developments of quantum optics and ultracold atoms. First, we discuss a possible realization of “phonon” physics, or as we call it refracton physics with optical lattices. To this aim we combine the physics of cold atoms with cavity QED, and investigate superfluid – Mott insulator quantum phase transition. The systems can exhibit cavity mode modifications d...
متن کاملDynamic optical lattices: two-dimensional rotating and accordion lattices for ultracold atoms.
We demonstrate a novel experimental arrangement which can rotate a 2D optical lattice at frequencies up to several kilohertz. Ultracold atoms in such a rotating lattice can be used for the direct quantum simulation of strongly correlated systems under large effective magnetic fields, allowing investigation of phenomena such as the fractional quantum Hall effect. Our arrangement also allows the ...
متن کاملThe cold atom Hubbard toolbox
We review recent theoretical advances in cold atom physics concentrating on strongly correlated cold atoms in optical lattices. We discuss recently developed quantum optical tools for manipulating atoms and show how they can be used to realize a wide range of many body Hamiltonians. Then we describe connections and differences to condensed matter physics and present applications in the fields o...
متن کاملDynamic Optical Lattices of Subwavelength Spacing for Ultracold Atoms.
We propose a scheme for realizing lattice potentials of subwavelength spacing for ultracold atoms. It is based on spin-dependent optical lattices with a time-periodic modulation. We show that the atomic motion is well described by the combined action of an effective, time-independent lattice of small spacing, together with a micromotion associated with the time modulation. A numerical simulatio...
متن کاملTime-resolved observation and control of superexchange interactions with ultracold atoms in optical lattices.
Quantum mechanical superexchange interactions form the basis of quantum magnetism in strongly correlated electronic media. We report on the direct measurement of superexchange interactions with ultracold atoms in optical lattices. After preparing a spin-mixture of ultracold atoms in an antiferromagnetically ordered state, we measured coherent superexchange-mediated spin dynamics with coupling e...
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