Nonequilibrium quantum many-body dynamics of hybrid atom-optomechanical condensate systems

混合原子光机械凝聚系统的非平衡量子多体动力学

• 批准号: 274978739
• 负责人: Professor Dr. Michael Thorwart
• 金额: --
• 依托单位: I. Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/274978739?language=en
• 关键词: Nonequilibrium; quantum; many; body; dynamics

In this project, we are interested in an exotic quantum state of matter, which we foresee to exist in the form of a supersolid in a hybrid atom-optomechanical system of an ultracold atom gas coupled via light to the quantum motion of a nanomechanical oscillator. The supersolid state of this hybrid quantum many-body systems is expected in the form of quantum droplets in the atom gas, shown by spontaneous density modulations in the gas. The droplets are quantum coherent macroscopic objects. The formation of quantum droplets requires either a mixture of Bose gases or an intrinsic long-range interaction between the atoms. In a hybrid atom-optomechanical systems in the internal-state coupling configuration, both ingredients are present at the same time. The coherent long-range interaction is induced by the coupling to the mechanical oscialltor. The hybrid quantum system could provide an efficient platform to realize such a supersolid state, also with the particularly interesting aspect that this exotic quantum many-body state is triggered by a macroscopic nanomechanical oscillator which is itself in a trivial classical solid state of matter, albeit its dynamics occurs in a quantum coherent nanomechanical mode. From a fundamental point of view, a supersolid and the appearance of quantum droplets are a clear manifestation of the quantum many-body character of the system which goes far beyond a common mean-field picture.

在这个项目中，我们对物质的异国量子状态感兴趣，我们预见到它可以在杂种原子机械系统中以supersolid的形式存在，该系统的超速原子气体通过光与纳米力学振荡器的量子运动相连。这种杂化量子多体系统的超ol-固态以原子气中的量子液滴的形式预期，这是气体中自发密度调制的表现。液滴是量子相干宏观对象。量子液滴的形成需要叶气体的混合物或原子之间的内在远程相互作用。在内部状态耦合构型中的混合原子 - 奥科机械系统中，这两种成分同时存在。连贯的远程相互作用是通过与机械旋词的耦合诱导的。 混合量子系统可以提供一个有效的平台来实现这种超脱落状态，也特别有趣的是，这种异国情调的量子多体状态是由宏观的纳米力学振荡器触发的，它本身是物质的琐碎经典固体状态，尽管它以量子的动力学发生在量子串联的纳米机械模式下。 从基本的角度来看，超olid和量子液滴的外观是系统的量子多体特征的明显表现，远远超出了均值均值的图像。