Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.185302
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Funding
- NSF through the Center of Ultracold Atoms
- NSF [PHY-0969731]
- ARO [W911NF-13-1-0031]
- DARPA OLE Program
- ONR
- Direct For Mathematical & Physical Scien
- Division Of Physics [0969731] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1125846] Funding Source: National Science Foundation
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We experimentally implement the Harper Hamiltonian for neutral particles in optical lattices using laser-assisted tunneling and a potential energy gradient provided by gravity or magnetic field gradients. This Hamiltonian describes the motion of charged particles in strong magnetic fields. Laser-assisted tunneling processes are characterized by studying the expansion of the atoms in the lattice. The band structure of this Hamiltonian should display Hofstadter's butterfly. For fermions, this scheme should realize the quantum Hall effect and chiral edge states.
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