Scientists Discover Elegant Twist to Master Quantum States

Scientists have introduced a novel method for manipulating quantum light by physically twisting atomically thin layers of hexagonal boron nitride, opening new pathways toward practical quantum technology applications. Researchers at the University of Technology Sydney demonstrated that by rotating and restacking these ultra-thin sheets, they can precisely change the colour and wavelength of photons emitted from quantum emitters embedded inside the material. These emitters act as single-photon sources, forming the foundation of emerging quantum computers, ultra-secure communication systems, and next-generation sensing devices. Although scientists have been able to identify and study such emitters for years, achieving reliable and fine control has remained a major scientific hurdle. This breakthrough uses the unique layered structure of hBN, which can be peeled apart, twisted at controlled angles, and reassembled, allowing researchers to actively tune optical behaviour in ways not possible in conventional bulk materials. According to lead researcher Dr. Angus Gale, this method provides a practical “lever” for controlling quantum systems, enabling repeated adjustment of light emission simply by altering twist angles during stacking. Co-researcher Professor Igor Aharonovich noted that combining layers at specific orientations can create entirely new physical properties. The results show stronger tuning than many existing platforms, potentially accelerating progress in quantum computing, secure communication, advanced sensing, healthcare technologies, navigation systems, and cybersecurity solutions.