Researchers at the 5th Institute of Physics at the University of Stuttgart have made three groundbreaking achievements in the study of circular Rydberg atoms. These are special types of atoms where electrons orbit the nucleus in stable, circular paths, making them highly useful for quantum computing and quantum simulation technologies. The results of the study were recently published in Nature Communications. Circular Rydberg atoms are significantly larger than typical atoms—about 3,000 times bigger. They can interact with each other over distances of about 5 micrometers, which is roughly one-tenth the width of a human hair. The Stuttgart team managed to keep these atoms stable for 11 milliseconds, which is more than 20 times longer than previously recorded states. The electrons in these atoms orbit in paths nearly 1.1 micrometers in diameter, making them about 10,000 times larger than those in normal atoms. Another major breakthrough was the team's ability to trap these atoms in optical tweezers for 133 milliseconds. This was achieved using a laser beam at room temperature, eliminating the need for expensive cooling systems like liquid helium, which were previously required. The method involved using a technique from the 1980s, where special metal walls shielded the atoms from disruptive thermal radiation, allowing for longer storage times. Professor Dr. Tilman Pfau, head of the 5th Institute of Physics, emphasized that the stability of Rydberg atoms has long been a challenge in building advanced quantum simulators. The team's findings demonstrate that it is possible to create highly stable Rydberg atoms at room temperature, which could lead to more powerful and precise quantum technologies. Dr. Florian Meinert, group leader at the institute, noted that these achievements open the door to more advanced quantum simulations and better control over quantum systems. Einius Pultinevicius, a doctoral researcher in Meinert's team, pointed out that these developments are crucial for advancing quantum simulators and quantum computers. Neutral atoms held in optical tweezers are considered one of the most promising platforms for building scalable quantum devices. The high stability of the Rydberg atoms allows for longer retention of quantum information and more precise control over atomic interactions. The University of Stuttgart now has a unique experimental setup for studying circular Rydberg atoms. The research team plans to use this platform to develop new quantum computers, quantum simulators, and highly sensitive quantum sensors. The study was published in Nature Communications in 2026.