利用约瑟夫森量子比特计算电流偏置信息总线中的几何相位

Geometric Phase in a Quantum Computa-tion with Josephson Qubits Using a Current-Biased Information Bus

量子计算是一种遵循量子力学规律调控量子信息单元进行计算的新型计算模式。本文利用电流偏置信息总线的Josephson量子位,计算了几何相位。发现该几何相位与大电流约瑟夫逊结、量子振荡器频率、对称约瑟夫逊能量耦合器的偏置电流无关,与施加到第k个量子位的栅极电容、磁通量子、外部电流和栅极电压无关。本文结果对利用约瑟夫森量子比特计算具有一定的理论意义。

Quantum computation is a new computational model which follows the rules of quantum mechanics to control the quantum information unit. This paper calculates the geometric phase by using the Josephson qubits of current-biased information bus. The geometric phase has nothing to do with the bias current of the large current-biased Josephson junction, the quantum oscillator frequency, the coupler with symmetric Josephson energies, and also the gate capacitance, ?ux quantum, external ?ux, and gate voltage applied to the kth qubit. The results of this paper have a certain theoretical significance to the calculation of the quantum bit of Josephson.