Inherent Mach-Zehnder interference with "which-way" detection for single   particle scattering in one dimension
  We study the coherent transport of single photon in a one-dimensional coupled-resonator-array, "non-locally" coupled to a two-level system. Since its inherent structure is a Mach-Zehnder interferometer, we explain the destructive interference phenomenon of the transmission spectrums according to the effect of which-way detection. The quantum realization of the present model is a nano-electromechanical resonator arrays with two nearest resonators coupled to a single spin via their attached magnetic tips. Its classical simulation is a waveguide of coupled defected cavity array with double couplings to a side defected cavity. 
Lan Zhou, Yue Chang, H. Dong, Le-Man Kuang, C. P. Sun
quant-ph