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Ground-State Properties of a Dilute Two-Dimensional Bose Gas

  • Volodymyr Pastukhov
Article
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Abstract

We revisit the problem of the calculation of zero-temperature properties for the dilute two-dimensional Bose gas. By using Popov’s hydrodynamic approach and perturbation theory on the two-loop level, we recover not only the known expansion for the ground-state energy but also calculate for the first time the condensate density and Tan’s contact.

Keywords

Two-dimensional Bose gas Thermodynamic properties Tan’s contact 

Notes

Acknowledgements

We thank Prof. A. Rovenchak for stimulating discussions. This work was partly supported by Project FF-30F (No. 0116U001539) from the Ministry of Education and Science of Ukraine.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department for Theoretical PhysicsIvan Franko National University of LvivLviv-5Ukraine

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