Entanglement Distribution In Star Network Based On Spin Chain In Diamond

There have been many achievements in the field of quantum information based on optical systems in the world.It is easy to generate entangled states and transmit information by using long-range optical systems.However,the short-range information transmission and communication in solid-state quantum computers has not yet been fully realized.Based on this purpose,a theoretical scheme of entanglement generation by solid-state spin interaction is proposed in this paper.Firstly,some basic concepts of quantum information,the definition of quantum entanglement and measurement of entanglement are introduced.Secondly,the principle of star spin and the method of Lindblad master equation are introduced.Then we introduce the entangled states of star spins.In this part,we discuss a spinstar chain structure based on diamond center,which can be used to extend the original star network.The numerical analysis shows that the maximum achievable entanglement exhibis exponential decays with the chain length and coherence time,and the entanglement capability of this configuration under the effect of disorder and spin loss is also studied.Finally,magnetic field gradient detection technology based on spin star is introduced.