Quantum Interference Patterns for N-Photon States Using a Gires-Tournois Etalon Assisted Dual-Pass Mach-Zehnder Interferometer

We introduce the concept of GTE-assisted double-pass MZI and its operation using photon number states, based on quantum-optical formalism. We also theoretically show impressive interferometric fringes for different combinations of N-photon states as circuit inputs.