Gouy phase engineering of self-splitting quantum correlations

• URL: http://arxiv.org/abs/2604.26816v1
• Date: Wed, 29 Apr 2026 15:44:45 GMT
• Title: Gouy phase engineering of self-splitting quantum correlations
• Abstract summary: We demonstrate the effect of self-splitting spatial quantum correlations induced by Gouy phase engineering.<n>We observe heralded single-photon interference and two-photon NOON state interference.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In this work, we demonstrate the effect of self-splitting spatial quantum correlations induced by Gouy phase engineering. In the process of spontaneous parametric down conversion the pump beam is structured with a mode superposition that produces a dynamical splitting and recombination of the light beam. This structure is transferred to the quantum correlations between signal and idler photons. As a result the joint two-photon probability distribution propagates like a self-splitting and recombining light beam, implementing a Mach-Zehnder-like interferometer. We observe heralded single-photon interference and two-photon NOON state interference. These results open new avenues for applications in quantum metrology.

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