极化子
物理
准粒子
凝聚态物理
光子
过剩
激子
量子光学
激发
激子极化
光学晶格
光子学
量子力学
超导电性
作者
Joonhyuk Kwon,Youngshin Kim,Alfonso Lanuza,Dominik Schneble
出处
期刊:Nature Physics
[Springer Nature]
日期:2022-03-31
卷期号:18 (6): 657-661
被引量:2
标识
DOI:10.1038/s41567-022-01565-4
摘要
The polariton, a quasiparticle formed by strong coupling of a photon to a matter excitation, is a fundamental ingredient of emergent photonic quantum systems ranging from semiconductor nanophotonics to circuit quantum electrodynamics. Exploiting the interaction between polaritons has led to the realization of superfluids of light as well as of strongly correlated phases in the microwave domain, with similar efforts underway for microcavity exciton-polaritons. Here, we develop an ultracold-atom analogue of an exciton-polariton system in which interacting polaritonic phases can be studied with full tunability and without dissipation. In our optical-lattice system, the exciton is replaced by an atomic excitation, while an atomic matter wave is substituted for the photon under a strong dynamical coupling. We access the band structure of the matter-wave polariton spectroscopically by coupling the upper and lower polariton branches, and explore polaritonic many-body transport in the superfluid and Mott-insulating regimes, finding quantitative agreement with our theoretical expectations. Our work opens up novel possibilities for studies of polaritonic quantum matter.
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