Remote interfacing between superconducting qubits and Rydberg-atom qubits via thermal coupled cavities

We propose a built-in fault-tolerant geometric operation to realize fast remote entanglement between superconducting qubits anchored to a 15 mK plate and Rydberg-atom qubits trapped near a 1 K plate via thermal coupled cavities. We show that this operation is robust against the detrimental effects of the thermal mode states and fluctuations in the control parameters. The operation can generate a high-fidelity entanglement between superconducting and atomic qubits under realistic experimental parameters, comparable to the results of the existing methods using auxiliary cooling systems. The scheme proposed here will promote the development of quantum network and distributed superconducting quantum computation.