An accordion superlattice for controlling atom separation in optical potentials
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Date
2023-03
Publication Type
Journal Article
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Abstract
We propose a method for separating trapped atoms in optical lattices by large distances. The key
idea is the cyclic transfer of atoms between two lattices of variable spacing, known as accordion
lattices, each covering at least a factor of two in lattice spacing. By coherently loading atoms
between the two superimposed potentials, we can reach, in principle, arbitrarily large atom
separations, while requiring only a relatively small numerical aperture. Numerical simulations of
our ‘accordion superlattice’ show that the atoms remain localized to one lattice site throughout the
separation process, even for moderate lattice depths. In a proof-of-principle experiment, we
demonstrate the optical fields required for the accordion superlattice using acousto-optic
deflectors. The method can be applied to neutral-atom quantum computing with optical tweezers,
as well as quantum simulation of low-entropy many-body states. For instance, a unit-filling atomic
Mott insulator can be coherently expanded by a factor of ten in order to load an optical tweezer
array with very high filling. In turn, sorted tweezer arrays can be compressed to form high-density
states of ultracold atoms in optical lattices. The method can also be applied to biological systems
where dynamical separation of particles is required.
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published
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Journal / series
Volume
25 (3)
Pages / Article No.
33037
Publisher
Deutsche Physikalische Gesellschaft
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Subject
quantum technologies; neutral atom quantum information processing; optical lattice; accordion lattice; optical tweezer array
Organisational unit
03599 - Esslinger, Tilman / Esslinger, Tilman
Notes
Funding
182650 - Interplay between Topology, Interactions and Dissipation in Driven Quantum Many-Body Systems (SNF)
742579 - Mass, heat and spin transport in interlinked quantum gases (EC)
742579 - Mass, heat and spin transport in interlinked quantum gases (EC)