2026/07/16 by Federico Garcia-Gaitan, Branislav K. Nikolic
#cond-mat.mes-hall
The search for optimal schemes and dissipative environments for mediating long-range entanglement between two distant nitrogen-vacancy centers (NVCs) in diamond is the subject of ongoing vigorous efforts due to potential applications of such microscopic solid-state qubits in quantum sensing and quantum computing. However, stabilizing entanglement of NVCs into steady-state poses a significant challenge, typically requiring tuning the environment into a \em nonequilibrium state. Here we microscopically derive a Lindblad quantum master equation for a system of two driven-dissipative NVCs, where the drive is microwave radiation and dissipation is provided by a single magnetic bath that is kept in \em equilibrium. This equation allows us to predict precise conditions for long-range and steady-state entanglement of NVCs, while it also suggests synthetic antiferromagnet as an optimal choice for a dissipative environment. By using realistic parameters from available experiments, we estimate steady-state concurrence reaching C≃ 0.28 for two NVCs separated by ∼ 100 nm.