  The beyond mean-field physics due to quantum fluctuations is often described
by the Lee-Huang-Yang (LHY) correction, which can be approximately written as a
simple analytical expression in terms of the mean-field employing local density
approximation. This model has proven to be very successful in predicting the
dynamics in dipolar Bose-Einstein condensates both qualitatively and
quantitatively. Yet, a small deviation between experimental results and the
theoretical prediction has been observed when comparing experiment and theory
of the phase boundary of a free-space quantum droplet. For this reason, we
revisit the theoretical description of quantum fluctuations in dipolar quantum
gases. We study alternative cutoffs, compare them to experimental results and
discuss limitations.
