Collective decoherence of nuclear spin clusters

摘要: The problem of dipole–dipole decoherence nuclear spins is considered for strongly entangled spin clusters. We consider the pure dephasing part interaction which can be classically interpreted as a random field fluctuating along quantization axes. Due to long (but finite) range nature this expected partially correlated at sites different in cluster. Consequently our results show that dynamics cluster described due with composite bath consisting fully and uncorrelated parts. term causes slower decay coherence larger times. rate scales up square root number spins, giving linear scaling resulting error. Our theory consistent recent experiments reported on