Exciton polaritons—quasi-particle excitations consisting of strongly coupled photons and excitons—present fascinating possibilities for photonic circuits, owing to their strong nonlinearity, ultrafast reaction times and their ability to form macroscopic quantum states at room temperature via non-equilibrium condensation. Past implementations of transistors and logic gates with exciton polaritons have been mostly realized using the spatial propagation of polariton fluids, which place high demands on the fabrication of the microcavities and typically require complex manipulations. In this work we have implemented the full set of logical gate functionalities (that is, temporal AND, OR and NOT gates) in localized exciton polaritons at room temperature, on the basis of precisely controlling the interplay between polariton condensate and exciton reservoir dynamics, using a two-pulse excitation scheme. The dynamics intrinsically covers the cascadability required by the logical operations, enabling efficient information processing without the need for spatial flow. The temporal polariton logic gates demonstrate advantages in ultrafast switching, universality and simplified compatibility with other dimensional controls, showing great potential for building polariton logic networks in strongly coupled light–matter systems.

激子极化激元（由强耦合光子和激子组成的准粒子激发）由于其强非线性、超快反应时间以及在室温下通过非平衡凝聚形成宏观量子态的能力，为光子电路提供了令人着迷的可能性。过去具有激子极化子的晶体管和逻辑门的实现大多是利用极化子流体的空间传播来实现的，这对微腔的制造提出了很高的要求，并且通常需要复杂的操作。在这项工作中，我们在精确控制极化子凝聚体和激子库动力学之间相互作用的基础上，在室温下实现了局域激子极化子的全套逻辑门功能（即时间与、或和非门），使用两脉冲激励方案。动态本质上涵盖了逻辑操作所需的级联性，无需空间流即可实现高效的信息处理。时间极化子逻辑门展示了超快切换、通用性以及与其他维度控制的简化兼容性方面的优势，显示出在强耦合光物质系统中构建极化子逻辑网络的巨大潜力。