Quantum phase transition in Bose-Fermi mixtures
Quantum Gases
2011-11-15 v2
Abstract
We study a quantum Bose-Fermi mixture near a broad Feshbach resonance at zero temperature. Within a quantum field theoretical model a two-step Gaussian approximation allows to capture the main features of the quantum phase diagram. We show that a repulsive boson-boson interaction is necessary for thermodynamic stability. The quantum phase diagram is mapped in chemical potential and density space, and both first and second order quantum phase transitions are found. We discuss typical characteristics of the first order transition, such as hysteresis or a droplet formation of the condensate which may be searched for experimentally.
Cite
@article{arxiv.1107.1196,
title = {Quantum phase transition in Bose-Fermi mixtures},
author = {Denis Ludwig and Stefan Floerchinger and Sergej Moroz and Christof Wetterich},
journal= {arXiv preprint arXiv:1107.1196},
year = {2011}
}
Comments
16 pages, 17 figures; typos corrected, one figure added