We numerically calculate Luttinger liquid parameter
Kin the anisotropic spin XXZD models with spin
$s = 1/2$
, 1, and 2. In order to obtain groundstate wavefunctions in Luttinger liquid phases, we employ the
$U(1)$
symmetric infinite matrix product states algorithm (iMPS). By using relation between the bipartite quantum fluctuations
Fand the so-called finite-entanglement scaling exponents
$\kappa$
, the Luttinger liquid parameter
Kcan be extracted. For
$s = 1/2$
and
$D=0$
, the numerically extracted Luttinger liquid parameter
Kis shown to be good agreement with the exact value. On using the fact that the spin-1 XXZD Hamiltonian with
$ D \leqslant - 2$
can be mapped to an effective spin-1/2 XXZ model, we calculate the Luttinger liquid parameter for the region of
$ D \leqslant - 2$
. It is shown that our numerical value of the Luttinger liquid parameter agree well with the exact values, here, the relative error less than
$1\%$
. Also, our Luttinger liquid parameter at
$\Delta = - 0.5$
and
$ D = 0$
is shown to be consistent with the result form the density matrix renormalization group (DMRG) method. These results suggest that the
$U(1)$
symmetric iMPS method can be applicable to calculate Luttinger liquid parameters if any system has a
$U(1)$
symmetry for gapless phases. For instance, we present our Luttinger liquid parameters for the first time for the spin-1 XXZD model under the other parameters and the spin-2 XXZD model with
$D = 1.5$
.