Robust and Fast Quantum State Transfer on Superconducting Circuits

Quantum computation attaches importance to high-precision quantum manipulation, where the quantum state transfer with high fidelity is necessary. Here, we propose a new scheme to implement the quantum state transfer of high fidelity and long distance, by adding on-site potential into the qubit chain and enlarging the proportion of the coupling strength between the two ends and the chain. In the numerical simulation, without decoherence, the transfer fidelities of 9 and 11 qubit chain are 0.999 and 0.997, respectively. Moreover, we give a detailed physical realization scheme of the quantum state transfer in superconducting circuits, and discuss the tolerance of our proposal against decoherence. Therefore, our scheme will shed light on quantum computation with long chain and high-fidelity quantum state transfer.

Automated summary

We propose a new scheme to achieve high-fidelity and long-distance quantum state transfer by adding on-site potential and increasing the proportion of coupling strength between the qubit chain and its ends. In numerical simulations, without decoherence, the transfer fidelities of 9 and 11 qubit chains are 0.999 and 0.997, respectively. Moreover, we provide a detailed physical realization scheme for quantum state transfer in superconducting circuits and discuss the tolerance of our proposal against decoherence. Therefore, our scheme offers new insights into quantum computation with long chains and high-fidelity quantum state transfer.