  The distance conjecture claims that as the modulus traverses along the
trans-Planckian geodesic distance, the effective field theory becomes invalid
by a descent of a tower of states from UV. Moreover, according to the recent
emergence proposal, the kinetic term of the modulus is entirely generated by
the wavefunction renormalization in which a tower of states are integrated out.
Assuming these two conjectures, we explore the role of a tower of states
coupled to the modulus in (in)stability of the de Sitter (dS) vacuum by
studying the one-loop effective potential generated by a tower of states. We
find that a fermionic tower of states makes the effective potential more or
less consistent with the dS swampland conjecture : either the slope or the
curvature of the potential is sizeable. In contrast, the effective potential
generated by a bosonic tower of states seems to allow the stable dS vacuum.
Therefore, in order to argue the instability of the dS vacuum, the additional
ingredient like supersymmetry breaking needs to be taken into account.
