Multi-target CNOT with optical devices

Hi everyone,

I am trying to map a simple quantum circuit of two CNOT gates into optical circuits with beam splitters and phase shifters,… specifically for GKP encoding.

I want to know how the arrangement of beam splitters would result in the outcome of this circuit if the input is a GKP qubit of

1/\sqrt{2} ({gkp_{000}} + {gkp_{111}})

Hi @mohadeseh_azari , welcome to the Forum!

Can you please rephrase your question? I’m not sure I understand it. Thanks!