One-way quantum synchronization could make quantum computers more reliable - Date: - June 12, 2026 - Source: - RIKEN - Summary: - Scientists at RIKEN have proposed a new way to make quantum systems synchronize in only one directionâlike a one-way street for sound particles known as phonons. The breakthrough combines two quantum effects to create a form of one-way quantum synchronization that remains surprisingly stable even when exposed to manufacturing flaws and environmental noise, two major obstacles that have long hindered real-world quantum technologies. - Share: 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. Despite considerable interest, developing a practical way to achieve this effect has proven difficult. Earlier proposals have generally been vulnerable to a range of limitations that make real-world implementation challenging. "Practical quantum technologies face critical challenges