Time-Resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
Boston University · Harvard University · +3 more institutions
Abstract
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 energies from 5 hertz up to 1 kilohertz. By dynamically modifying the potential bias between neighboring lattice sites, the magnitude and sign of the superexchange interaction can be controlled, thus allowing the system to be switched between antiferromagnetic and ferromagnetic spin interactions. We compare our findings…
Citation impact
- FWCI
- 34.56
- Percentile
- 100%
- References
- 36
Authors
10- STStefan TrotzkyCorresponding
Boston University, Harvard University, University of Kaiserslautern, Johannes Gutenberg University Mainz, Center for Astrophysics Harvard & Smithsonian
- PCPatrick CheinetCorresponding
Boston University, Harvard University, University of Kaiserslautern, Johannes Gutenberg University Mainz, Center for Astrophysics Harvard & Smithsonian
- SFSimon Fölling
Boston University, Harvard University, University of Kaiserslautern, Johannes Gutenberg University Mainz, Center for Astrophysics Harvard & Smithsonian
- MSMichael S. Feld
Boston University, Harvard University, University of Kaiserslautern, Johannes Gutenberg University Mainz, Center for Astrophysics Harvard & Smithsonian
- USU. Schnorrberger
Boston University, Harvard University, University of Kaiserslautern, Johannes Gutenberg University Mainz, Center for Astrophysics Harvard & Smithsonian
Topics & keywords
- Superexchange
- Ultracold atom
- Antiferromagnetism
- Condensed matter physics
- Optical lattice
- Physics
- Ferromagnetism
- Magnetism