Creating State-Dependent Lattices for Ultracold Fermions by Magnetic Gradient Modulation

Abstract

We demonstrate a versatile method to create state-dependent optical lattices by applying a magnetic field gradient modulated in time. This allows for tuning the relative amplitude and sign of the tunnelling for different internal states. We observe substantially different momentum distributions depending on the spin-state of fermionic 40K atoms. Using dipole-oscillations we probe the spin-dependent band structure and find good agreement with theory. In-situ expansion-dynamics demonstrate that one state can be completely localized whilst others remain itinerant. A systematic study shows negligible heating and lifetimes of several seconds in the Hubbard regime.

References in corpus (18)

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• Dynamical control of matter-wave tunneling in periodic potentials
• Tunable gauge potential for neutral and spinless particles in driven lattices
• Observation of antiferromagnetic correlations in the Hubbard model with ultracold atoms
• Multi-Component Quantum Gases in Spin-Dependent Hexagonal Lattices
• Coherent control of dressed matter waves
• Single Particle Tunneling in Strongly Driven Double Well Potentials
• Sublattice addressing and spin-dependent motion of atoms in a double-well lattice
• Superfluidity of Interacting Bosonic Mixtures in Optical Lattices
• Scattering in Mixed Dimensions with Ultracold Gases
• Scattering Theory for Floquet-Bloch States
• Probing nearest-neighbor correlations of ultracold fermions in an optical lattice
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• Spin-1/2 fermions on spin-dependent optical lattices
• State-dependent, addressable subwavelength lattices with cold atoms
• Spin Orbit Coupling in Periodically Driven Optical Lattices
• Exploring Unconventional Hubbard Models with Doubly Modulated Lattice Gases
• Expansion of matter waves in static and driven periodic potentials

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