Strongly correlated Fermions strongly coupled to light
Strongly correlated Fermions strongly coupled to light
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DOI：
10.1038/s41467-020-16767-8
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发表时间：
2019-11
影响因子：
16.6
通讯作者：
K. Roux;H. Konishi;V. Helson;J. Brantut
中科院分区：
文献类型：
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作者：
K. Roux;H. Konishi;V. Helson;J. Brantut
物质中的强量子相关性是材料的一些最非凡的特性的原因，从磁性到高温超导性，但它们在量子设备中的集成需要与光子的强相干耦合，这仍然是固态系统中的一个艰巨的技术挑战。在腔量子电动力学中，量子气体如玻色-爱因斯坦凝聚体或晶格气体与光强耦合。然而，与固体中的电子相比，费米子量子物质和具有受控相互作用的原子系统迄今都没有与光子强耦合。在这里，我们报告的量子简并幺正费米气体与光的强耦合在高精细度腔。我们绘制出耦合系统的光谱，并观察到良好的解决了修饰状态，从腔光子与气体的每个自旋分量的强耦合。我们研究自旋平衡和自旋极化气体，并发现定量协议与从头计算描述轻物质相互作用。我们的系统提供了完整的和同时控制的原子-原子和原子-光子相互作用的量子简并制度，打开了广泛的前景量子模拟。
Strong quantum correlations in matter are responsible for some of the most extraordinary properties of materials, from magnetism to high-temperature superconductivity, but their integration in quantum devices requires a strong, coherent coupling with photons, which still represents a formidable technical challenge in solid state systems. In cavity quantum electrodynamics, quantum gases such as Bose-Einstein condensates or lattice gases have been strongly coupled with light. However, neither Fermionic quantum matter, comparable to electrons in solids, nor atomic systems with controlled interactions, have thus far been strongly coupled with photons. Here we report on the strong coupling of a quantum-degenerate unitary Fermi gas with light in a high finesse cavity. We map out the spectrum of the coupled system and observe well resolved dressed states, resulting from the strong coupling of cavity photons with each spin component of the gas. We investigate spin-balanced and spin-polarized gases and find quantitative agreement with ab initio calculation describing light-matter interaction. Our system offers complete and simultaneous control of atom-atom and atom-photon interactions in the quantum degenerate regime, opening a wide range of perspectives for quantum simulation.