Science Daily November 1, 2021
Lattice defects in crystals often come along with certain magnetic properties. To use them as promising systems for applications in quantum technologies an international team of researchers (Germany, Russia) has developed an efficient method to control their spin states using surface acoustic waves (SAW). They demonstrated a giant interaction between the strain field of SAW and the excited-state spin of silicon vacancies in silicon carbide, which is about two orders of magnitude stronger than in the ground state. The simultaneous spin driving in the ground and excited states with the same SAW leads to the trapping of the spin along a direction given by the frequency detuning from the corresponding spin resonances. The coherence of the spin-trapped states becomes only limited by relaxation processes intrinsic to the ground state. This provides new opportunities for efficient on-chip quantum information protocols and coherent sensing. Their approach opens the path to new methods for processing quantum information inaccessible so far…read more. Open Access TECHNICAL ARTICLEÂ
Ground-state and excited-state spin-acoustic resonances… Credit: SCIENCE ADVANCES, 29 Oct 2021, Vol 7, Issue 44Â