Journal
PHYSICAL REVIEW LETTERS
Volume 117, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.195302
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Funding
- NSF-PHY [1211914, 1521080, NSF-PFC-PHY-1125844]
- AFOSR [FA9550-13-1-0086]
- Department of Defense through the NDSEG program
- NRC postdoctoral fellowship program
- AFOSR MURI ADVANCED QUANTUM MATERIALS
- ARO [W911NF-12-1-0228]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1521080] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1211914] Funding Source: National Science Foundation
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Recent experiments with dilute trapped Fermi gases observed that weak interactions can drastically modify spin transport dynamics and give rise to robust collective effects including global demagnetization, macroscopic spin waves, spin segregation, and spin self-rephasing. In this Letter, we develop a framework for studying the dynamics of weakly interacting fermionic gases following a spin-dependent change of the trapping potential which illuminates the interplay between spin, motion, Fermi statistics, and interactions. The key idea is the projection of the state of the system onto a set of lattice spin models defined on the single-particle mode space. Collective phenomena, including the global spreading of quantum correlations in real space, arise as a consequence of the long-ranged character of the spin model couplings. This approach achieves good agreement with prior measurements and suggests a number of directions for future experiments.
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