A measurement process is constructed to project an arbitrary two-mode N-photon state to a maximally entangled N-photon state. The result of this projection measurement shows a typical interference fringe with an N-photon de Broglie wavelength. For an experimental demonstration, this measurement process is applied to a four-photon superposition state from two perpendicularly oriented type-I parametric down-conversion processes. Generalization to the projection measurement of an arbitrary N-photon state can be easily made and may have wide applications in quantum information. As an example, we formulate it for precision phase measurement.
No takes yet. Share an insight, caveat, or question.
Sun et al. (2006) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: