伪量子位II。约瑟夫森结的纠缠
False qubits II. Entanglement of Josephson junctions
摘要：
简要讨论了最近两个约瑟夫森结量子比特纠缠态的实验证据。有人认为，实验数据的解释强烈依赖于假设的理论模型。也就是说，量子比特态应该是某个有效哈密顿量的最低本征态，因此自动正交，而在更基本的多粒子模型中的简单分析表明，这些状态应该强烈重叠。这使得测量程序的标准解释受到质疑。
英文摘要：
The recent experimental evidence for entangled states of two Josephson junction qubits is briefly discussed. It is argued that the interpretation of the experimental data strongly depends on the assumed theoretical model. Namely, the qubit states are supposed to be the lowest lying eigenstates of a certain effective Hamiltonian and hence automatically orthogonal, while the simple analysis within a more fundamental many-particle model shows that those states should strongly overlap. This makes the standard interpretation of the measurement procedure questionable.
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