reduction of three-body losses, these droplets are of a great experimental interest. Such low-dimensional systems can be created by employing tight confinements in one or two spatial directions. However, tight externals potentials significantly modify the excitation spectrum, and, in particular, the zero-point energy of the quasi-particles. Therefore, quantum droplets in reduced dimensions possess different properties then those in three-dimensional (3D) space both for BEC mixtures [@Petrov16] and for dipolar BECs [@Mishra16].

In experiments, the quasi-two-dimensional (quasi-2D) or quasi-one-dimensional (quasi-1D) regimes are obtained by a tight confinement introduced by external potential in one or two directions. The potential introduces an additional linear length scale $L$ of the tight confinement. This scale sets a lower limit on the excitation momentum to $ \sim \hbar/L$ and minimal excitation energy $\varepsilon_0 = (\hbar^2/2m)(2\pi/L)^2$ in the confined direction(s). If both thermal energy $k_BT$ as well as characteristic interaction energy $\sim g_{11}n_1+g_{22}n_2$, are too small to allow for excitation in the tight direction(s), i.e. $\varepsilon_0 \gg k_BT$, and $\varepsilon_0 \gg g_{11}n_1,g_{22}n_2$, i.e., $\varepsilon_0$ is the largest energy scale of the problem, then from a point of view of kinematics the system is low-dimensional.

As shown in [@Petrov16], the low-dimensional liquids are even more exotic then their 