Induced phase transition of BECs in optical lattices by impurity

In this work, the influence of imparity on BECs in optical lattices is investigated, and the possibility of MI-SF transition induced by impurity is verified. After the numerical calculation, the schematic phase diagram is discussed with an emphasis on the role of impurity. When n10 = n20, the phase boundaries coincide with each other; when n10 < n20 and U12 < 0, the phase boundaries do not intersect at all; when n10 < n20 and U12 > 0, the phase boundaries may or may not intersect, depending on the values of U12, n10 and n20.

In this work, the influence of imparity on BECs in optical lattices is investigated, and the possibility of MI-SF transition induced by impurity is verified. After the numerical calculation, the schematic phase diagram is discussed with an emphasis on the role of impurity. When n10 = n20, the phase boundaries coincide with each other; when n10 &lt; n20 and U12 &lt; 0, the phase boundaries do not intersect at all; when n10 &lt; n20 and U12 &gt; 0, the phase boundaries may or may not intersect, depending on the values of U12, n10 and n20.