论文标题
超级量子相变的有限系统多政治性
Finite-system Multicriticality at the Superradiant Quantum Phase Transition
论文作者
论文摘要
我们证明了有限系统多政治性在Qubit-Boson模型中的存在，在Qubit-Boson模型中，有偏见的量子位共同耦合到单模玻感场。偏见与玻色子量耦合之间的相互作用产生了丰富的相图，显示了不同阶的多个上力相和相位边界。特别是，在适当的偏见配置中，多个阶段可能无法区分，这是多政治性的签名。确定了表征这些多政治点的一系列普遍性类。此外，我们提出了一种被困的离子实现，具有使用少数离子在实验上探索多政治现象的潜力。结果为实验中的多政治普遍性类探测了一种新颖的方式。
We demonstrate the existence of finite-system multicriticality in a qubit-boson model where biased qubits collectively coupled to a single-mode bosonic field. The interplay between biases and boson-qubit coupling produces a rich phase diagram showing multiple superradiant phases and phase boundaries of different orders. In particular, multiple phases can become indistinguishable in appropriate bias configurations, which is the signature of multicriticality. A series of universality classes characterizing these multicritical points are identified. Moreover, we present a trapped-ion realization with the potential to explore the multicritical phenomena experimentally using a small number of ions. The results open a novel way to probe multicritical universality classes in experiments.
