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We demonstrate an angular momentum-enhanced protocol that permits an angulardisplacement estimation by using tunable squeezed Bell state and paritydetection. We consider the resolution and the sensitivity, super-resolution ispresented along with Heisenberg scaling sensitivity for arbitrary tunablefactor, the tunable factor which can optimize the sensitivity is alsodiscussed. Additionally, we analyze the advantages of using angular momentumvia considering and comparing simulation results. Under the situation of theoptimal tunable factor, the Heisenberg-limited sensitivity and$2\left(\ell+1\right)$-fold super-resolution peak with quantum number $\ell$are achieved.

Angular displacement estimation of Heisenberg scaling: Tunable squeezed Bell state via the enhancement of spin and orbital angular momenta