Induced Boundary Flow on the c = 1 Orbifold Moduli Space

Boundary flow in the $c=1$ 2d CFT of a ${\mathbb{Z}}_2$ orbifold of a free boson on a circle is considered. Adding a bulk marginal operator to the $c=1$ orbifold branch induces a boundary flow. We show that this flow is consistent for any bulk marginal operator and known initial given boundary condition. The supersymmetric $c=3\mathrm{/}2$ case is also mentioned. The supersymmetric $c=3\mathrm{/}2$ case is also mentioned. For the circle branch of the moduli space this has been shown in arXiv:hep-th/0609034v2. The ground state multiplicity ($g_b$) is calculated and it is shown that it does indeed decrease.