Fock State Transfer via a Rabi Driven Qubit

Efficient quantum state transfer is a cornerstone for the operation of bosonic circuit QED platforms, underpinning both the DiVincenzo criteria for quantum computing and the implementation of gates in dual-rail architectures. We introduce a novel method for coupling two cavity modes via a Rabi-driven qubit. By applying sideband tones detuned by the Rabi frequency, we engineer a controllable interaction between the modes. This approach enables the transfer of Fock states at significantly faster rates than previous methods. Experimental results confirm the effectiveness of the technique, highlighting its potential as a powerful tool for advancing bosonic quantum computing.