Simple method to create powerful quantum states discovered
7 reported
Researchers at the University of Chicago Pritzker School of Molecular Engineering have proposed a new theoretical method to generate and control a wide range of entangled quantum states using tools already common in many quantum physics laboratories. The approach involves making small adjustments to the energy levels of atoms inside an optical cavity, reducing the system’s symmetry to produce highly entangled states without adding complicated hardware. The work, published in Physical Review X, could advance ultra-precise quantum sensing and open new opportunities for exploring fundamental physics. The research was supported by Q-NEXT, a U.S. Department of Energy National Quantum Information Science Research Center led by DOE’s Argonne National Laboratory. The method remains theoretical for now, but researchers are discussing possible experimental tests with other groups.
What’s reported
The team at the University of Chicago discovered a simple way to create powerful quantum states that are normally difficult to produce.
The method uses cavity quantum electrodynamics (cavity QED), where atoms are placed inside an optical cavity with two mirrors that trap light.
Additional lasers or magnetic fields shift the excited state energies of different groups of atoms, reducing symmetry and allowing atoms to behave differently.
By adjusting which atoms receive particular energy shifts, scientists can tune the system to produce a variety of entangled states without altering physical hardware.
The approach can be used for quantum sensing, measuring field gradients while rejecting background noise that affects both locations equally.
The same platform can generate the AKLT state, a many-body entangled state first introduced in the 1980s, which may have applications in quantum computing.
The work remains theoretical; researchers are discussing experimental tests and exploring more sophisticated arrangements.
Key figures
Aashish Clerk, professor of molecular engineering at UChicago PME and senior author of the study
Anjun Chu, postdoctoral researcher in the Clerk group and first author of the work
Sources: ScienceDaily
