Fig. 3: Two-cat gate operation.
From: Entangling Schrödinger’s cat states by bridging discrete- and continuous-variable encoding
a, b Two-cat Rabi oscillations between \(\left\vert {0}_{{{{\rm{C}}}}}{1}_{{{{\rm{C}}}}}\right\rangle\) and \(\left\vert {1}_{{{{\rm{C}}}}}{0}_{{{{\rm{C}}}}}\right\rangle\). The colours represent the number parity of each KPO. ϕg and Δg represent the phase and detuning of the gate pulse, respectively. Zero detuning (Δg = 0) means that the frequency of the gate pulse is equal to (ωp1 − ωp2)/2. One-mode Wigner functions at times corresponding to no gate (0 ns), \(\sqrt{{{{\rm{iSWAP}}}}}\) gate (275 ns), and iSWAP gate (480 ns) are shown above. c Pulse sequence for the two-cat Rabi. d Two-mode Wigner functions of the KPO state after the \(\sqrt{{{{\rm{iSWAP}}}}}\) gate. All Wigner functions showing the results of the \(\sqrt{{{{\rm{iSWAP}}}}}\) gate are enclosed in black frames.
