Abstract
It was recently observed that liquid 4He confined in porous glass lost its superfluidity at high pressures and very low temperatures, causing the quantum phase transition by the strong correlation. Motivated by this experiment, we study the behavior of a strongly correlated Bose fluid in a disordered environment, such as the Bose-Einstein condensate (BEC) and superfluid critical temperatures, by using a model of 3-dimensional Bose fluid in a random potential. For the perturbation of the repulsive interaction between particles, we introduced two-loop renormalized self energy by the self-consistent calculation, which is effective near the BEC critical temperature. Calculating the second order perturbation with respect to the random potential, we found that the BEC disappears at high densities, which is qualitatively consistent with the experimental results.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.