Ultracold atoms in an optical lattice with dynamically variable periodicity

Abstract

The use of a dynamic "accordion" lattice with ultracold atoms is demonstrated. Ultracold atoms of ${}^{87}$Rb are trapped in a two-dimensional optical lattice, and the spacing of the lattice is then increased in both directions from 2.2 to 5.5 microns. Atoms remain bound for expansion times as short as a few milliseconds, and the experimentally measured minimum ramp time is found to agree well with numerical calculations. This technique allows an experiment such as quantum simulations to be performed with a lattice spacing smaller than the resolution limit of the imaging system, while allowing imaging of the atoms at individual lattice sites by subsequent expansion of the optical lattice.

4 pages, 3 figures. Minor changes made and references updated

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• Vortex formation of a Bose-Einstein condensate in a rotating deep optical lattice
• Emulating Molecular Orbitals and Electronic Dynamics with Ultracold Atoms
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• Noise Sensitivities for an Atom Shuttled by a Moving Optical Lattice via Shortcuts to Adiabaticity
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• All-optical transport and compression of ytterbium atoms into the surface of a solid immersion lens
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• Optical signatures of antiferromagnetic ordering of fermionic atoms in an optical lattice
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• Directed excitation transfer in vibrating chains by external fields
• Experimental Observation of Single- and Multisite Matter-Wave Solitons in an Optical Accordion Lattice
• Improved anharmonic trap expansion through enhanced shortcuts to adiabaticity
• Quadrature interferometry for nonequilibrium ultracold bosons in optical lattices
• Synthetic charge-flux quantum liquids
• An accordion lattice based on the Talbot effect
• A quantum register using collective excitations in a Bose-Einstein condensate
• Design of a technique to measure the density of ultracold atoms in a short-period optical lattice in three dimensions with single atom sensitivity
• Scale-Invariant Continuous Entanglement Renormalization of a Chern Insulator
• Tunable optical lattices for the creation of matter-wave lattice solitons