Robust and Fast Quantum State Transfer on Superconducting Circuits

TL;DR

This paper proposes a new high-fidelity quantum state transfer scheme for superconducting circuits, utilizing on-site potential and adjusted coupling, achieving near-perfect transfer over long distances in simulations.

Contribution

The authors introduce a novel approach to quantum state transfer that enhances fidelity and distance, with detailed physical implementation in superconducting circuits.

Findings

Transfer fidelities of 0.999 for 9 qubits and 0.997 for 11 qubits in simulations

Scheme is tolerant to decoherence effects

Provides a practical implementation pathway for long-distance quantum communication

Abstract

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.