Nonlinear collective-spin dynamics for quantum-enhanced sensing in solid-state platforms
The paper investigates how nonlinear interactions between many spins in solid-state materials can generate quantum correlations that surpass standard measurement limits. By using specific Hamiltonians like one-axis twisting, researchers show that initial coherent spin states evolve into highly entangled states, such as spin-squeezed and GHZ states. This enables quantum sensing with precision scaling better than the standard quantum limit.