School of Physics and Astronomy, The University of Nottingham, Nottingham NG7 2RD, United Kingdom.
Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Technikerstr. 21A, 6020 Innsbruck, Austria and Institut für Experimentalphysik, Universität Innsbruck,Technikerstr. 25, 6020 Innsbruck, Austria.
Phys Rev Lett. 2014 Jan 17;112(2):023603. doi: 10.1103/PhysRevLett.112.023603. Epub 2014 Jan 15.
We explore trapped ions as a setting to investigate nonequilibrium phases in a generalized Dicke model of dissipative spins coupled to phonon modes. We find a rich dynamical phase diagram including superradiantlike regimes, dynamical phase coexistence, and phonon-lasing behavior. A particular advantage of trapped ions is that these phases and transitions among them can be probed in situ through fluorescence. We demonstrate that the main physical insights are captured by a minimal model and consider an experimental realization with Ca+ ions trapped in a linear Paul trap with a dressing scheme to create effective two-level systems with a tunable dissipation rate.
我们探索了囚禁离子体系，以研究耗散自旋与声子模式耦合的广义 Dicke 模型中的非平衡相。我们发现了一个丰富的动力学相图，包括类超辐射态、动力学相共存和声子激射行为。囚禁离子的一个特别优势是，这些相以及它们之间的转变可以通过荧光原位探测。我们证明了主要的物理见解可以通过一个最小模型来捕捉，并考虑了一个实验实现，即用 Ca+离子在一个线性 Paul 阱中进行囚禁，并采用调谐方案来创建具有可调耗散率的有效两能级系统。
