Scientists found a surprisingly simple way to create powerful quantum states

A simple tweak to a common quantum system could unlock powerful new quantum states for ultra-precise sensing and future quantum technologies. Date: June 6, 2026 Source: University of Chicago Summary: A team at the University of Chicago has discovered a surprisingly simple way to create powerful quantum states that are normally difficult to produce. , researchers can generate a wide variety of highly entangled states without adding complicated hardware. Share: Facebook Twitter Pinterest LinkedIN Email FULL STORY Researchers have shown that a few simple adjustments to a standard quantum optics setup can generate a surprising range of highly entangled quantum states. Credit: Clerk Group Many of the most promising quantum technologies, including advanced sensors and future quantum computers, depend on a phenomenon known as entanglement, where particles become deeply connected and influence one another in ways that cannot be explained . Creating the complex entangled states needed for these technologies has traditionally required sophisticated equipment and carefully designed experimental systems. Researchers at the University of Chicago Pritzker School of Molecular Engineering (UChicago PME) have now proposed a much simpler approach. Their new theoretical method can generate and control a wide range of entangled quantum states using tools that are already common in many quantum physics laboratories. The work, published in Physical Review X, could help advance ultra precise quantum sensing and open new opportunities for exploring fundamental physics. "We wanted to take simple ingredients that you find in a lot of physical platforms and put these together in a minimal way to get something interesting, complex and powerful," said Aashish Clerk, professor of molecular engineering at UChicago PME and senior author of the new study. The research was supported by Q-NEXT, a U. Department of Energy (DOE) National Quantum Information Science Research Center led by DOE's Argonne National Laboratory. Rethinking Cavity QED Systems The team's approach is based on cavity quantum electrodynamics, commonly known as cavity QED. In these experiments, atoms or other particles are placed inside an optical cavity, which consists of two mirrors that trap light between them. The particles then interact with the confined light inside the cavity. A limitation of many cavity QED systems is that all of the atoms interact with the light in exactly the same way. Because the atoms are effectively indistinguishable, the range of quantum states that can be produced is restricted. "The challenge has always been that these systems have too much symmetry. All the atoms are talking to light in the same way," Clerk said. "That really restricts what kind of entangled states you get." In a typical cavity QED setup, each atom has a ground state and an excited state separated by a specific energy difference.