Deterministic multi-mode nonlinear coupling for quantum circuits

Understand

We present a general technique for deterministic implementation of a multi-mode nonlinear coupling between several propagating microwave or optical modes in quantum circuits.

• The measurement induced technique combines specifically prepared resource states together with feasible feed-forward operations.
• We explore several ways of generating the suitable resource states and discuss their difference on an illustrative example of cubic coupling between two modes.
• We also show that the required entangled states with requisite nonlinear properties can be already generated in the present day experiments.