On October 5, 2026, the Faculty of Physics and Engineering Physics at the University of Science, VNU-HCM, hosted a scientific seminar entitled “Diamond Defects: A Quantum Window into Matter,” featuring Prof. Jean-François Roch, Professor of Physics at ENS Paris-Saclay, Université Paris-Saclay, France, and Director of Quantum Saclay. The seminar provided in-depth perspectives on quantum physics, quantum materials, and the potential applications of quantum sensing technologies in contemporary scientific research.
During the seminar, Prof. Roch introduced the distinctive properties of diamond in quantum physics research, with particular emphasis on defects in its crystal lattice. These defects can function as “artificial atoms,” enabling researchers to investigate and exploit quantum properties at the microscopic scale. Among them, the nitrogen-vacancy (NV) center is a prominent quantum system that allows scientists to harness spin states to develop sensors capable of measuring magnetic fields at the microscale.
The presentation also explored the operating principles of diamond-based quantum sensors, including the use of optical and microwave techniques to initialize, manipulate, and read out spin states. These methods offer promising opportunities to advance highly sensitive measurement technologies for investigating and characterizing the physical properties of materials.
A key topic was the application of NV centers in a diamond anvil cell (DAC). In this measurement system, diamond serves a dual purpose: generating extremely high pressures and functioning as a quantum sensor to probe the magnetic response of materials under extreme conditions. This approach is particularly valuable for investigating high-pressure phenomena, including superconductivity. The ability to detect magnetic field expulsion - a defining characteristic of the superconducting state - highlights the potential of quantum sensing for exploring novel phases of matter and emergent physical phenomena.
Through in-depth scientific discussions and practical examples, the seminar underscored the close connections between quantum physics, quantum materials, and advanced sensing technologies. It also provided faculty members, researchers, and students with opportunities to engage with emerging research directions, exchange scientific perspectives, explore potential collaborations, and develop new interdisciplinary research ideas.
The Faculty of Physics and Engineering Physics at the University of Science, Vietnam National University Ho Chi Minh City, extends its sincere gratitude to Prof. Jean-François Roch, faculty members, researchers, and students for their participation and valuable contributions to the seminar. Their engagement and academic exchange contributed to fostering a vibrant research environment, strengthening academic connections, and promoting the advancement of knowledge in modern physics.