Journal
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
Volume 49, Issue 8, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1751-8113/49/8/085205
Keywords
Bethe ansatz; Lieb-Liniger model; interacting bosons
Categories
Funding
- Israel Science Foundation (ISF) [1028/12]
- US-Israel Binational Science Foundation (BSF) [2010132]
- Shlomo Kaplansky academic chair
- National Science Foundation [NSF PHY11-25915]
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In 1963, Lieb and Liniger solved exactly a one-dimensional model of bosons interacting by a repulsive delta-potential and calculated the ground state in the thermodynamic limit. In the present work, we extend this model to a potential of three delta-functions-one of them is repulsive and the other two are attractive -modeling some aspects of the interaction between atoms, and we present an approximate solution for a dilute gas. In this limit, for low energy states, the results are found to be reduced to the ones of an effective Lieb-Liniger model with an effective delta-function of strength c(eff) and the regime of stability is identified. This may shed light on some aspects of interacting bosons.
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