"Precision Quantum Ping-Pong: Atoms Bounce Single Photon with High Control"

Researchers from TU Wien have theoretically demonstrated that using a special lens, a single photon emitted by one atom can be reabsorbed by a second atom and returned back to the first atom with high precision, resembling a game of ping-pong. By utilizing the concept of the Maxwell fish-eye lens, the team showed that the coupling between the atom and different oscillating modes can ensure the transfer of the photon between atoms. This breakthrough could pave the way for quantum control systems to study effects at extremely strong light-matter interaction.