Scientists from the University of Geneva, together with colleagues from the University of Salerno and the CNR-SPIN Institute in Italy, have made a significant discovery in the field of quantum physics. They have identified a hidden geometry in quantum materials that influences the movement of electrons in a way similar to how gravity bends light. The results of their research have been published in the prestigious scientific journal Science.

Modern technologies require the development of highly efficient materials with unique properties based on the principles of quantum physics. Studying matter at the microscopic level has already led to the creation of transistors and modern computer systems.

Recent scientific studies show that certain materials develop a specific geometry that alters the trajectories of electrons, much like gravity affects the path of light. This geometry, known as the quantum metric, represents the curvature of quantum space through which electrons move. It has a significant impact on various microscopic processes, but until now, detecting it has posed a serious challenge for researchers.

The research team detected the quantum metric at the interface between two oxides—strontium titanate and lanthanum aluminate—which are recognized as quantum materials. The presence of the quantum metric is revealed by changes in electron trajectories when exposed to strong magnetic fields. Observing this effect allows for more precise determination of the optical, electronic, and transport properties of materials.

The study also demonstrated that the quantum metric is an intrinsic property of many materials, contradicting previous assumptions. This discovery opens new perspectives for research and practical applications of quantum geometry in a wide range of materials. Its potential impact on the development of terahertz electronics, superconductivity, and light-matter interaction processes could be substantial.