Coherent coupling between distant electron spins is of great importance in large scale quantum computation with spin qubits in quantum dots. A promising approach to achieve this is using an on-chip high-impedance superconducting resonator. Here, we present a coherent spin-spin interface enabled by virtual photons in the resonator, which is a crucial ingredient for distant high-fidelity two-qubit gates. Moreover, we improve the readout signal from the resonator and therefore the dispersive sensing by integrating a travelling-wave parametric amplifier (TWPA). These results pave the way towards demonstrating a two-qubit iSWAP gate between remote spin qubits.
Title of Poster
Coherent interface between distant spin qubits