Fig. 3: Multi-partite photonic state.
From: Shortcuts to adiabaticity in superconducting circuits for fast multi-partite state generation
a Wigner representation of the reduced density matrix of the first field mode at final time tf for a system consisting into three field mode coupled to a single qubit. Projection of the Wigner function to the b coordinate space and c the momentum space, corresponding to a Gaussian function centered in \(\pm {d}_{\max }=3\). d Fidelity \({{{{{{{\mathcal{F}}}}}}}}\) between the target Greenberger-Horne-Zeilinger state in Eq. (5) with the state \(\left\vert \Psi (t)\right\rangle\) for two different maximal cavity displacement \({d}_{\max }=1\) to the blue line, and \({d}_{\max }=3\) for the green line, respectively. The numerical simulations are carried out with the same parameters as those in Fig. 1.
