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Mixture of scalar bosons and two-color fermions in one dimension: Superfluid-insulator transitions by Avella, R.; Mendoza-Arenas, J. J.; Franco, R.; Silva-Valencia, J. is a scholarly article available to read on EtoBox.

What is Mixture of scalar bosons and two-color fermions in one dimension: Superfluid-insulator transitions about?

Superfluid-insulator transitions in a one-dimensional mixture of two-color fermions and scalar bosons are studied within the framework of the Bose-Fermi-Hubbard model. Zero-temperature phase diagrams are constructed for repulsive intraspecies interactions and attractive or repulsive interspecies couplings. In addition to the trivial Mott insulator phases, we report the emergence of new non-trivial insulator phases that depend on the sign of the boson-fermion interaction. These non-trivial insulator phases satisfy the conditions $\rho_B\pm\rho_F=n$ and $\rho_B\pm \tfrac{1}{2}\rho_F=n$, with the plus (minus) sign for repulsive (attractive) interactions and $n$ an integer. Far from fermionic half-filling, the boson-fermion interaction drives a gapless-gapped transition in the spin sector. Our findings could be observed experimentally in state-of-the-art cold-atom setups.

Author

Avella, R.; Mendoza-Arenas, J. J.; Franco, R.; Silva-Valencia, J.

Published

2020

Language

EN