A team of theoretical physicists at RIKEN has proposed a new way to achieve one-way quantum synchronization of phonons, the particles associated with sound. The approach stands out because it remains highly effective even in the face of real-world challenges such as manufacturing imperfections and environmental noise.
Many modern technologies rely on components that behave like one-way streets. These devices allow particles or signals to move freely in one direction while greatly restricting movement in the opposite direction. Known as nonreciprocal components, they are widely used in microwave and optical systems to direct signals and reduce unwanted reflections.
"Nonreciprocal components enable signals to travel along desired paths, whereas they are strongly attenuated in the opposite direction," notes Franco Nori of the RIKEN Center for Quantum Computing (RQC). "This ability finds applications ranging from signal processing to invisible cloaking."
One-Way Quantum Synchronization
Researchers have long sought to create a related phenomenon known as nonreciprocal quantum synchronization. In this process, two quantum systems become synchronized when information flows in one direction, but the synchronization does not occur in reverse.
