Journal
SCIENCE
Volume 327, Issue 5973, Pages 1621-1624Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1184565
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Funding
- Deutsche Forschungsgemeinschaft
- European Union
- EuroQUAM
- Defense Advanced Research Projects Agency
- Air Force Office of Scientific Research
- German-Israeli Project Cooperation
- U.S.-Israel Binational Science Foundation
- Engineering and Physical Sciences Research Council [EP/E036473/1] Funding Source: researchfish
- EPSRC [EP/E036473/1] Funding Source: UKRI
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The interplay of thermodynamics and quantum correlations can give rise to counterintuitive phenomena in many-body systems. We report on an isentropic effect in a spin mixture of attractively interacting fermionic atoms in an optical lattice. As we adiabatically increase the attraction between the atoms, we observe that the gas expands instead of contracting. This unexpected behavior demonstrates the crucial role of the lattice potential in the thermodynamics of the fermionic Hubbard model.
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