Line Plot from Scientific Research

Quantum phase synchronization between the two branches of the tree. The data show the parity of each four-qubit GHZ state as a function of free evolution time t0 before the /2 rotation. The parity of both branches is tuned to give a relative phase difference. The dashed vertical line indicates the working point used for the experiment. Data in light red show the parity when slightly varying the photon separation T (see main text).

DOI