Selective control of fourth-order interferences by means of comb-like two-photon entangled states

We experimentally show the selective control of fourth-order recurrent interferences in a modified version of a Hong-Ou-Mandel interferometer using comb-like two-photon states. The comb spectral/temporal structure is obtained by inserting an etalon cavity in the signal path of an entangled photon pair obtained by pulsed spontaneous parametric down-conversion.