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首页> 外文期刊>Journal of physics, A. Mathematical and theoretical >Searching for structure beyond parity in the two-qubit Dicke model
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Searching for structure beyond parity in the two-qubit Dicke model

机译：在二量子位Dicke模型中寻找奇偶校验之外的结构

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We try to classify the spectrum of the two-qubit Dicke model by calculating two quantum informationmeasures of its eigenstates: theWootters concurrence and the mutual quantum information. We are able to detect four spectral sets in each parity subspace of the model: one set is regular and given by the product of a Fock state of the field and the singlet Bell state of the qubits; the rest are fairly regular and related to the triplet states of the Bell basis. The singlet states become trapping states when we couple the Dicke model to an environment of harmonic oscillators, making them candidates for generating maximally entangled states in experimental realizations of ion trap quantum electrodynamics (QED) and circuit QED. Furthermore, they are robust and survive the inclusion of driving and dipole–dipole interactions, pointing to their use for storing quantum correlations, and it is straightforward to provide a generalization of these trapping states to the Dicke model with even number of qubits.
机译：我们试图通过计算两个本征态的量子信息量度来对两量子位Dicke模型的光谱进行分类：Wootters并发和相互量子信息。我们能够在模型的每个奇偶校验子空间中检测到四个光谱集：一个光谱集是规则的，由场的Fock状态和qubit的单重Bell态的乘积给出;其余的是相当规则的，并且与贝尔的三重态有关。当我们将Dicke模型耦合到谐波振荡器的环境时，单重态变成俘获态，使它们成为离子阱量子电动力学（QED）和电路QED的实验实现中产生最大纠缠态的候选者。此外，它们具有鲁棒性，并能在包含驱动和偶极-偶极相互作用的情况下幸存下来，这表明它们可用于存储量子相关性，并且很容易将这些俘获态的泛化提供给具有偶数个量子位的Dicke模型。

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