In this paper, we propose a scheme for quantum information transfer by a gap-tunable bridge qubit between two superconducting (SC) qubits, which are initially prepared in separable quantum states. As is observed, enough high-fidelity and maximally entanglement between the two superconducting resonators, as well as between the two of qubits, can be achieved. It is shown that by implementing driven magnetic field to high detuned superconducting qubits, we are able to induce sidebands in the qubit–resonator and also qubit–qubit couplings. The influence of decay rates of qubits and resonator modes on the dynamics of quantum fidelity and entanglement is also investigated, either individually or simultaneously, by numerical analysis. Our numerical results show that the decay rate parameters have destructive, constructive, and no critical effect on the fidelity, depending on the chosen decay parameters. Moreover, they have destructive effects on the generated entangled state in the outlined quantum information transfer process.

中文翻译：

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在不存在和存在耗散的情况下，使用超导量子位进行量子信息传递和纠缠态生成

在本文中，我们提出了一种通过两个超导（SC）量子位之间的间隙可调桥量子位传输量子信息的方案，这些超导量子位最初是在可分离的量子态下制备的。如所观察到的，可以在两个超导谐振器之间以及两个量子比特之间实现足够的高保真度和最大的纠缠度。结果表明，通过对高失谐超导量子比特施加驱动磁场，我们能够在量子比特-谐振器以及量子比特-量子比特耦合中感应出边带。通过数值分析，还单独或同时研究了量子位的衰减速率和谐振器模式对量子保真度和纠缠动力学的影响。我们的数值结果表明，衰减率参数具有破坏性，建设性，并且对保真度没有关键影响，具体取决于所选的衰减参数。而且，它们在概述的量子信息传递过程中对所产生的纠缠态具有破坏性作用。