期刊
PHYSICAL REVIEW A
卷 79, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.061601
关键词
antiferromagnetism; entropy; fermion systems; optical lattices
资金
- Triangle de la Physique, the DARPA-OLE program
- ICAM
- EPSRC [EP/F016379/1]
- FQRNT
- ANR
- EPSRC [EP/F016379/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F016379/1] Funding Source: researchfish
We propose an experimental procedure to cool fermionic atoms loaded into an optical lattice. The central idea is to spatially divide the system into entropy-rich and -poor regions by shaping the confining potential profile. Atoms in regions of high entropy per particle are subsequently isolated from the system. We discuss how to experimentally carry out this proposal and perform a quantitative study of its efficiency. We find that the entropy per particle, s, can typically be reduced by a factor of 10 such that entropies lower than s/k(B)similar to 0.2 can be reached. Cooling into highly sought-after quantum phases (such as an antiferromagnet) can thus be achieved. We show that this procedure is robust against variations of the experimental conditions.
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