We develop a design of a hybrid quantum interface for quantum information transfer （QIT）, adopting a nanome- chanical resonator as the intermedium, which is magnetically coupled with individual nitrogen-vacancy cent...We develop a design of a hybrid quantum interface for quantum information transfer （QIT）, adopting a nanome- chanical resonator as the intermedium, which is magnetically coupled with individual nitrogen-vacancy centers as the solid qubits, while eapacitively coupled with a coplanar waveguide resonator as the quantum data bus. We describe the Hamiltonian of the model, and analytically demonstrate the QIT for both the resonant interaction and large detuning cases. The hybrid quantum interface allows for QIT between arbitrarily selected individual nitrogen-vacancy centers, and has advantages of the sealability and controllability. Our methods open an alter- native perspective for implementing QIT, which is important during quantum storing or processing procedures in quantum computing.展开更多
Northwest China is one of the seven major geographical regions in China,including Shaanxi,Gansu,Qinghai,Ningxia and Xinjiang.Since the implementation of a series of national policies such as the western development,th...Northwest China is one of the seven major geographical regions in China,including Shaanxi,Gansu,Qinghai,Ningxia and Xinjiang.Since the implementation of a series of national policies such as the western development,the economy of the provinces and autonomous regions in Northwest China has been greatly developed.But the imbalance in the development process is also very prominent.Through the analysis of the factors that affect the transfer of the center of gravity and the impact of the shift on the region,we can explore a better path of regional coordinated development.This paper selects five northwest provinces,according to the center of gravity transfer model,studies the changes of the economic center of gravity from 2000 to 2018,and uses the Theil index method to calculate the difference degree of regional economy.The results show that:the development of Northwest China is not balanced,the economic gap between provinces is large.The economic center of gravity moves to the southeast and deviates from the geographical center of Northwest China.There is a positive relationship between the change of gravity center and the size of economic difference.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 11305021the Fundamental Research Funds for the Central Universities of China under Grants Nos 3132014229 and 3132014328
文摘We develop a design of a hybrid quantum interface for quantum information transfer （QIT）, adopting a nanome- chanical resonator as the intermedium, which is magnetically coupled with individual nitrogen-vacancy centers as the solid qubits, while eapacitively coupled with a coplanar waveguide resonator as the quantum data bus. We describe the Hamiltonian of the model, and analytically demonstrate the QIT for both the resonant interaction and large detuning cases. The hybrid quantum interface allows for QIT between arbitrarily selected individual nitrogen-vacancy centers, and has advantages of the sealability and controllability. Our methods open an alter- native perspective for implementing QIT, which is important during quantum storing or processing procedures in quantum computing.
基金Tianjin art science planning project“Tianjin intangible cultural heritage protection and inheritance system research”(D18055).
文摘Northwest China is one of the seven major geographical regions in China,including Shaanxi,Gansu,Qinghai,Ningxia and Xinjiang.Since the implementation of a series of national policies such as the western development,the economy of the provinces and autonomous regions in Northwest China has been greatly developed.But the imbalance in the development process is also very prominent.Through the analysis of the factors that affect the transfer of the center of gravity and the impact of the shift on the region,we can explore a better path of regional coordinated development.This paper selects five northwest provinces,according to the center of gravity transfer model,studies the changes of the economic center of gravity from 2000 to 2018,and uses the Theil index method to calculate the difference degree of regional economy.The results show that:the development of Northwest China is not balanced,the economic gap between provinces is large.The economic center of gravity moves to the southeast and deviates from the geographical center of Northwest China.There is a positive relationship between the change of gravity center and the size of economic difference.
