Dense coding using superpositions of Bell-states is proposed.The generalized Grover's algorithm is used to prepare the initial entangled states,and the reverse process of the quantum algorithm is used to determine...Dense coding using superpositions of Bell-states is proposed.The generalized Grover's algorithm is used to prepare the initial entangled states,and the reverse process of the quantum algorithm is used to determine the entangled state in the decoding measurement.Compared with the previous schemes,the superpositions of two Bell-states are exploited.Our scheme is demonstrated using a nuclear magnetic resonance(NMR)quantum computer.The corresponding manipulations are obtained.Experimental results show a good agreement between theory and experiment.We also generalize the scheme to transmit eight messages by introducing an additional two-state system.展开更多
Much attention has been paid to 3-nitro-1,2,4-triazol-5-one(NTO)as a high energyand low sensitivity energetic material.Its metal salts also have some potential uses inammunition.Therefore,the authors prepared the sing...Much attention has been paid to 3-nitro-1,2,4-triazol-5-one(NTO)as a high energyand low sensitivity energetic material.Its metal salts also have some potential uses inammunition.Therefore,the authors prepared the single crystal of cobalt salt of NTO,measured its structure and studied its thermal decomposition mechanism.展开更多
Three-body interaction plays an important role in many-body physics, and quantum computer is efficient in simulating many-body interactions. We have experimentally demonstrated the general three-body interactions in a...Three-body interaction plays an important role in many-body physics, and quantum computer is efficient in simulating many-body interactions. We have experimentally demonstrated the general three-body interactions in a three-qubit nuclear magnetic resonance ensemble quantum computer. Using a nuclear magnetic resonance computer we implemented general forms of three-body interactions including σ x 1 σ z 2 σ x 3 and σ x 1 σ z 2 σ y 3 The results show good agreement between theory and experiment. We have also given a concise and practical formula for a general n-body interaction in terms of one-and two-body interactions.展开更多
A multiple round quantum dense coding scheme based on the quantum phase estimation algorithm is proposed and implemented in a three qubit nuclear magnetic resonance(NMR)quantum computer.Using an m+1 qubit system,Bob c...A multiple round quantum dense coding scheme based on the quantum phase estimation algorithm is proposed and implemented in a three qubit nuclear magnetic resonance(NMR)quantum computer.Using an m+1 qubit system,Bob can transmit one of 2m+1 messages to Alice,through manipulating only one qubit and exchanging it between Alice and Bob for m rounds.The information capacity is enhanced to m+1 bits as compared to m bits in a classical scheme.The scheme has been demonstrated in NMR system,and the experimental results show a good agreement between theory and experiment.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.10374010)the China Postdoctoral Science Foundation.
文摘Dense coding using superpositions of Bell-states is proposed.The generalized Grover's algorithm is used to prepare the initial entangled states,and the reverse process of the quantum algorithm is used to determine the entangled state in the decoding measurement.Compared with the previous schemes,the superpositions of two Bell-states are exploited.Our scheme is demonstrated using a nuclear magnetic resonance(NMR)quantum computer.The corresponding manipulations are obtained.Experimental results show a good agreement between theory and experiment.We also generalize the scheme to transmit eight messages by introducing an additional two-state system.
文摘Much attention has been paid to 3-nitro-1,2,4-triazol-5-one(NTO)as a high energyand low sensitivity energetic material.Its metal salts also have some potential uses inammunition.Therefore,the authors prepared the single crystal of cobalt salt of NTO,measured its structure and studied its thermal decomposition mechanism.
基金the National Natural Science Foundation of China (Grant Nos. 10374010 and 10325521) the National Basic Research Program of China (Grant No. 2006CB921106)
文摘Three-body interaction plays an important role in many-body physics, and quantum computer is efficient in simulating many-body interactions. We have experimentally demonstrated the general three-body interactions in a three-qubit nuclear magnetic resonance ensemble quantum computer. Using a nuclear magnetic resonance computer we implemented general forms of three-body interactions including σ x 1 σ z 2 σ x 3 and σ x 1 σ z 2 σ y 3 The results show good agreement between theory and experiment. We have also given a concise and practical formula for a general n-body interaction in terms of one-and two-body interactions.
文摘A multiple round quantum dense coding scheme based on the quantum phase estimation algorithm is proposed and implemented in a three qubit nuclear magnetic resonance(NMR)quantum computer.Using an m+1 qubit system,Bob can transmit one of 2m+1 messages to Alice,through manipulating only one qubit and exchanging it between Alice and Bob for m rounds.The information capacity is enhanced to m+1 bits as compared to m bits in a classical scheme.The scheme has been demonstrated in NMR system,and the experimental results show a good agreement between theory and experiment.
