期刊
PHYSICAL REVIEW A
卷 87, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.87.013610
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资金
- FAPESP (Fundacao de Amparo a Pesquisa do Estado de Sao Paulo)
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico) of Brazil
- Danish Agency for Science, Technology, and Innovation
The momentum distribution is a powerful probe of strongly interacting systems that are expected to display universal behavior. This is contained in the contact parameters which relate few- and many-body properties. Here we consider a Bose gas in two dimensions and explicitly show that the two-body contact parameter is universal and then demonstrate that the momentum distribution at next-to-leading order has a logarithmic dependence on momentum which is vastly different from the three-dimensional case. Based on this, we propose a scheme for measuring the effective dimensionality of a quantum many-body system by exploiting the functional form of the momentum distribution. DOI: 10.1103/PhysRevA.87.013610
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