Journal
PHYSICAL REVIEW LETTERS
Volume 121, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.225303
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Funding
- MEXT/JSPS KAKENHI [25220711, 26247064, 16H00990, 16H00801, 16H01053]
- Impulsing Paradigm Change through Disruptive Technologies (ImPACT) program, JST CREST [JPMJCR1673]
- Matsuo Fundation
- JSPS
- Grants-in-Aid for Scientific Research [16H01053, 16H00801, 16H00990] Funding Source: KAKEN
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Large-spin cold atomic systems can exhibit unique phenomena that do not appear in spin-1/2 systems. We report the observation of nearest-neighbor antiferromagnetic spin correlations of a Fermi gas with SU(N) symmetry trapped in an optical lattice. The precise control of the spin degrees of freedom provided by an optical pumping technique enables us a straightforward comparison between the cases of SU(2) and SU(4). Our important finding is that the antiferromagnetic correlation is enhanced for the SU(4)-spin system compared with SU(2) as a consequence of a Pomeranchuk cooling effect. This work is an important step towards the realization of novel SU(N > 2) quantum magnetism.
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