Superresolution of two unbalanced point sources assisted by the entangled partner

Sub-diffraction-limit resolution, or superresolution, has been successfully demonstrated in recent theoretical and experimental studies for two equal-brightness incoherent point sources. However, practical situations of either nonequal brightness (i.e., unbalancedness) partial coherence are shown to have fatal effects on such superresolution. As a step towards resolving issues, we consider the both unbalancedness form quantum state coherence) together by including an entangled degree freedom Unexpectedly, it is found that negative can counteraffect each other, thus permitting credible when measurement analyzed partner's rotated basis. The least resolvable non-zero two-source separation also identified analytically. Our result represents useful guidance realization superresolution vector-structure analog classical light sources suggests our analysis applies contexts.