Phase-resolved measurement of entangled states via common-path interferometry

• URL: http://arxiv.org/abs/2406.11744v1
• Date: Mon, 17 Jun 2024 17:02:14 GMT
• Title: Phase-resolved measurement of entangled states via common-path interferometry
• Authors: Andrew A. Voitiv, Mark T. Lusk, Mark E. Siemens,
• Abstract summary: We propose and experimentally demonstrate a method to directly measure the phase of biphoton states using an entangled mode as a collinear reference. As one particularly useful application, we use the new methodology to directly measure the geometric phase accumulation of entangled photons.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose and experimentally demonstrate a method to directly measure the phase of biphoton states using an entangled mode as a collinear reference. The technique is demonstrated with entangled photonic spatial modes in the Laguerre-Gaussian basis, and it is applicable to any pure quantum system containing an exploitable reference state in its entanglement spectrum. As one particularly useful application, we use the new methodology to directly measure the geometric phase accumulation of entangled photons.

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