  We demonstrate mini droplet, mega droplet and stripe formation in a dipolar
164Dy condensate, using an improved mean-field model including a
Lee-Huang-Yang-type interaction, employing a quasi-two-dimensional (quasi-2D)
trap in a way distinct from that in the pioneering experiment, M. A. Norcia et.
al., Nature 596, 357 (2021), where the polarization z direction was taken to be
perpendicular to the quasi-2D x-y plane. In the present study we take the
polarization z direction in the quasi-2D x-z plane. Employing the same trapping
frequencies as in the experiment, and interchanging the frequencies along the y
and z directions, we find the formation of mini droplets for number of atoms N
as small as N = 1000. With the increase of number of atoms, a
spatially-periodic supersolid-like one-dimensional array of mega droplets
containing 50000 to 200000 atoms are formed along the x direction in the x-y
plane. These mega droplets are elongated along the polarization z direction,
consequently, the spatially periodic arrangement of droplets appears as a
stripe pattern in the x-z plane. To establish the supersolidity of the droplets
we demonstrate continued dipole-mode and scissors-mode oscillations of the
droplet-lattice pattern. The main findings of the present study can be tested
experimentally with the present know-how.
