Two research teams in the United States each published an article in Science on the 7th, stating that they have, for the first time, placed a single molecule in a quantum entangled state. In this strange state, molecules can simultaneously associate and interact with each other even if they are far apart. The research team pointed out that this study has laid the foundation for many applications, including building better quantum computers, quantum simulators, and sensors. Realizing controllable quantum entanglement faces many challenges, and scientists have never allowed individual molecules to undergo quantum entanglement before. Researchers point out that compared to atoms, molecules have more quantum degrees of freedom and can interact in new ways, making them particularly suitable for certain quantum information processing and quantum simulations of complex materials. But molecules are very complex and their degrees of freedom are difficult to control, making it extremely difficult to entangle individual molecules in quantum entanglement. In the latest research, Lawrence Chuck, an assistant professor of physics at Princeton University, and others have chosen a polar molecule, cooled it to ultra-low temperatures with a laser, and then used a laser beam system called "optical tweezers" to capture individual molecules, creating an array of molecules one by one, such as isolated molecular pairs and defect free molecular strings. Next, they encoded quantum bits into non rotating and rotating states of molecules and proved that these molecular quantum bits are still coherent (stacked). In addition, they used a series of microwave pulses to entangle individual molecules in a coherent manner and allowed this entanglement to persist for a certain period of time, achieving a dual quantum bit gate for two entangled molecules, which is the cornerstone of universal digital quantum computing and complex material simulation. Similar experiments conducted by scientists at Harvard University have also proven this point. The research team points out that this molecular array has the potential to become a new platform in many quantum research fields, such as simulating quantum multibody systems to discover new magnetic properties of materials. Quantum information technology is currently a hot frontier scientific field, and related research progress is constantly emerging. The coherent manipulation and entanglement state preparation of multiple quantum bits are the core indicators for the development of scalable quantum information technology, especially quantum computing. The necessary conditions for implementing quantum computing include scalability, initializability, and long coherence. Among them, scalability refers to increasing the number of quantum bits, which can achieve large-scale quantum computing; The long coherence time, which refers to the quantum state maintaining quantum coherence, can be used for logical operations. Previously, scientists have achieved experimental preparation of multiple optical quantum bit super entangled states, placing individual molecules in a quantum entangled state, which is expected to bring new inspiration to quantum information technology research. (Lai Xin She)