| The field of quantum information has achieved fruitful results in recent years.As a branch of quantum information,quantum computing,quantum measurement,quantum walk,quantum transmission,and quantum encryption technology are all related to quantum entanglement,and the preparation of quantum entangled states has become the key to this.The NOON state is the simplest quantum entanglement state.The preparation of the quantum state is naturally noticeable.However,the previous NOON states use the coupling between the atom and the optical resonator,and the measured properties are used in the resonator.In the NOON state,the short-lived state of the prepared quantum state is almost ready for use,and when the value of N is large,the preparation of the state is often insufficient,and the effect of the prepared quantum state is also not stable.This paper uses the Rydberg blocking effect to directly prepare the NOON state in the atom without storing it in the resonant cavity.We mainly prepare the NOON state through the following different schemes.The main contents and methods of preparation are as follows:In the presence of the Rydberg blocking effect,the adiabatic method was used to study the preparation of the 2002 state under the four-atom system and the preparation of the 3003 state under the hexaatomic system,and the method of preparation was promoted to obtain the general form of NOON.State preparation method.A series of studies have been conducted on other quantum state disturbances during the preparation of the target state,and general conclusions have also been obtained during the course of the study.The coherent evolution method was also used to study the existence of the Rydberg blockade effect,and the special NOON state was prepared by using the principle of coherence evolution.Finally,the NOON state of the target state was also obtained and studied during the study.Other excitations of the quantum state,which have certain significance for the study of quantum states. |
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