Coherently excited superresolution using intensity product of phase-controlled quantum erasers via polarization-basis projection measurements

Recently, the delayed-choice quantum eraser has been applied for coherently excited superresolution using phase-controlled projection measurements of laser light to overcome the diffraction limit in classical physics as well as to solve the limited photon number of the N00N state in quantum physics. Unlike other methods of phase-controlled superresolution in a noninterferometric system, the proposed method is for the intensity products between phase-controlled quantum erasers, resulting in superresolution compatible with the most conventional sensing metrologies. Here, both the general scheme and solution of the phase-controlled quantum eraser-based superresolution are derived for arbitrary Nth-order intensity correlation, where the superresolution shows the photonic de Broglie wave-like quantum feature. Furthermore, the phase quantization of the superresolution is discussed to better understand quantum mechanics.