Non-inertial motion dependent entangled Bell-state

We show the targeted phase-manipulation of an entangled photonic Bell statevia non-inertial motion. To this end, we place a very compact laboratory,consisting of a SPDC source and a Sagnac interferometer, on a rotating platform(non-inertial reference frame). The photon pairs of a $\ket{\phi}$-state are ina superposition of co- and counter-rotation. The phase of the$\ket{\phi}$-state is linearly dependent on the angular velocity of therotating platform due to the Sagnac effect. We measure the visibility andcertify entanglement with the Bell-CHSH parameter $S$. Additionally, we conducta partial quantum state tomography on the Bell states in a non-inertialenvironment. Our experiment showcases the unitary transformation of anentangled state via non-inertial motion and constitutes not only a switchbetween a $\ket{\phi^{-}}$-state and a $\ket{\phi^{+}}$-state but also afurther experiment at the interplay of non-inertial motion and quantum physics.