Super-resolution of two unbalanced point sources assisted by the entangled partner

• URL: http://arxiv.org/abs/2112.01725v1
• Date: Fri, 3 Dec 2021 05:33:13 GMT
• Title: Super-resolution of two unbalanced point sources assisted by the entangled partner
• Authors: Abdelali Sajia and X.-F. Qian
• Abstract summary: Sub-diffraction-limit resolution, or super-resolution, has been successfully demonstrated for two-point sources with ideal equal-brightness and strict incoherenceness. We consider practical situations of either non-equal brightness (i.e., unbalancenss) or partial coherence to have fatal effects on resolution precision. We find that the two negative effects can counter affect each other, thus permitting credible super-resolution, when the measurement is analyzed in the entangled partner's rotated basis.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Sub-diffraction-limit resolution, or super-resolution, had been successfully demonstrated by recent theoretical and experimental studies for two-point sources with ideal equal-brightness and strict incoherenceness. Unfortunately, practical situations of either non-equal brightness (i.e., unbalancenss) or partial coherence are shown to have fatal effects on resolution precision. As a step toward resolving such issues, we consider both effects together by including an entangled partner of the two-point sources. Unexpectedly, it is found that the two negative effects can counter affect each other, thus permitting credible super-resolution, when the measurement is analyzed in the entangled partner's rotated basis. A least resolvable finite two-source separation is also identified analytically. Our result represents useful guidance towards the realization of super-resolution for practical point sources. The vector-structure analog of quantum and classical light sources also suggests that our analysis applies to both contexts.

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