Inherent Mach-Zehnder interference with "which-way" detection for single particle scattering in one dimension

TL;DR

This paper investigates the quantum interference effects in single-photon transport within a one-dimensional resonator array coupled to a two-level system, revealing how which-way detection influences destructive interference phenomena.

Contribution

It introduces a model where inherent Mach-Zehnder interference is analyzed in a quantum setting, linking it to which-way detection effects in single-particle scattering.

Findings

Destructive interference explained by which-way detection effects.

Quantum realization involves nano-electromechanical resonator arrays.

Classical simulation uses coupled cavity waveguides with side defects.

Abstract

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.