Aberration cancellation in quantum interferometry
C. Bonato, A. V. Sergienko, B. E. A. Saleh, S. Bonora, P. Villoresi
TL;DR
This paper demonstrates experimentally that even-order aberrations can be canceled in quantum interferometry using spatial entanglement, improving interference quality by mitigating certain wavefront distortions.
Contribution
First experimental demonstration of spatial aberration cancellation in quantum interferometry leveraging multi-parameter spatial-spectral entanglement.
Findings
Odd-order aberrations affect quantum interference.
Even-order aberrations are canceled due to entanglement.
Spatial aberration cancellation enhances quantum interferometry robustness.
Abstract
We report the first experimental demonstration of even-order aberration cancellation in quantum interferometry. The effect is a spatial counterpart of the spectral group velocity dispersion cancellation, which is associated with spectral entanglement. It is manifested in temporal interferometry by virtue of the multi-parameter spatial-spectral entanglement. Spatially-entangled photons, generated by spontaneous parametric down conversion, were subjected to spatial aberrations introduced by a deformable mirror that modulates the wavefront. We show that only odd-order spatial aberrations affect the quality of quantum interference.
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