The atomic inversion dynamics in the mode-mode competing system is studied bymeans of fully quantum theory. A general solution to the Schroedinger equation of this system isobtained. The influence of the relative comp...The atomic inversion dynamics in the mode-mode competing system is studied bymeans of fully quantum theory. A general solution to the Schroedinger equation of this system isobtained. The influence of the relative competing strength between the atom and the two-mode Geld onthe atomic inversion is disccussed. We show that the presence of the mode-mode competition canresult in periodical collapses-revivals of the atomic inversion.展开更多
The explicit form of the evolution operator for the three-atom Tavis-Cummings model is given. The atoms can be entangled through their interaction with a thermal field. The degree of entanglement depends on the mean p...The explicit form of the evolution operator for the three-atom Tavis-Cummings model is given. The atoms can be entangled through their interaction with a thermal field. The degree of entanglement depends on the mean photon number of the thermal field and the initial state of the atoms.展开更多
The chaotic properties for six particles interacting by a monopole pairing force in a two-j shell model coupled with a deformed core are studied in the frame of particle-rotor model. The nearest-neighbor distribution ...The chaotic properties for six particles interacting by a monopole pairing force in a two-j shell model coupled with a deformed core are studied in the frame of particle-rotor model. The nearest-neighbor distribution of energy levels and spectral rigidity in the two-j shell are compared with those in the single-j case. The results show that the system is more regular in the two-j model than that in the single-j case.展开更多
OBJECTIVE： To study the effect of Wuziyanzong treatment on the sperm quality and content of cal- cium ions （Ca2＋） in oligoasthenospermia rats. METHODS： A model of oligoasthenospermia was induced in 50 Sprague Daw...OBJECTIVE： To study the effect of Wuziyanzong treatment on the sperm quality and content of cal- cium ions （Ca2＋） in oligoasthenospermia rats. METHODS： A model of oligoasthenospermia was induced in 50 Sprague Dawley rats by treatment with tripterygium glycosides at 30 mg/kg per day for 8 weeks. They were divided randomly into a model group, a positive group （Huangjingzanyu capsule, 3.01 g/kg）, and low, medium and high dose Wuziyanzong treatment groups （2.30, 4.60, 9.20 g/kg crude drug respectively） with 10 in each group. Another 10 rats were used as a control group. The rats in the control and model groups were administered distilled water, while the rats in the remaining groups were administered Wuziyan- zong for 30 d. The epididymides were removed, spermatozoa recovered and the sperm density and viability were measured. The spermatozoa were pu- rified and the contents of Ca2~ in the cytoplasm and mitochondria were detected by flow cytometry and atomic absorption spectrometry, respectively. RESULTS： After 8 weeks of treatment with tripteryg- ium glycosides, the sperm density, sperm activity and the Ca2~ content of spermatozoa in the model rats were all significantly decreased compared with the control group （all P〈O.05）. After 30 d treatment, the sperm density and activity improved and the Ca2＋ content of sperm were increased significantly in the medium and high dose Wuziyanzong treat- ment groups in comparison with the model group （all P〈O.05）. CONCLUSION： The Wuziyanzong treatment in： creased sperm density, improved sperm viability and enhanced the content of Ca2＋ in the sperm cy- toplasm and mitochondria in this rat model of oli- goasthenospermia.展开更多
Kitaev model has both Abelian and non-Abelian anyonic excitations. It can act as a starting point for topological quantum compu- tation. However, this model Hamiltonian is difficult to implement in natural condensed m...Kitaev model has both Abelian and non-Abelian anyonic excitations. It can act as a starting point for topological quantum compu- tation. However, this model Hamiltonian is difficult to implement in natural condensed matter systems. Here we propose a quantum simulation scheme by constructing the Kitaev model Hamiltonian in a lattice of coupled cavities with embedded A-type three-level atoms. In this scheme, several parameters are tunable, for example, via external laser fields. Importantly, our scheme is based on currently existing technologies and it provides a feasible way of realizing the Kitaev model to explore topological excitations.展开更多
The Hooke＇s atoms with two or more than two electrons give rise to an interesting quantum mechanical model with valuable practical applications. In this work, we study the electronic properties near the origin of the...The Hooke＇s atoms with two or more than two electrons give rise to an interesting quantum mechanical model with valuable practical applications. In this work, we study the electronic properties near the origin of the harmonic potential. It is seen that the spherically averaged density, ~, exhibits an interesting character -- it has only even order terms in its small r expansion. The spherical average of the Hartree potential, ~, and the spherical average of the Kohn-Sham exchange-correlation potential, 9~c, are also shown to have the same property -- all odd order terms in their expansions vanish. F^rthermore, the analysis and results extend also to the case of two-dimensional models. While only models interacting via. the Coulomb potential are primarily considered in the article, the results also extend to models interacting via. other potentials （viz. Van der Waals potential）.展开更多
文摘The atomic inversion dynamics in the mode-mode competing system is studied bymeans of fully quantum theory. A general solution to the Schroedinger equation of this system isobtained. The influence of the relative competing strength between the atom and the two-mode Geld onthe atomic inversion is disccussed. We show that the presence of the mode-mode competition canresult in periodical collapses-revivals of the atomic inversion.
文摘The explicit form of the evolution operator for the three-atom Tavis-Cummings model is given. The atoms can be entangled through their interaction with a thermal field. The degree of entanglement depends on the mean photon number of the thermal field and the initial state of the atoms.
文摘The chaotic properties for six particles interacting by a monopole pairing force in a two-j shell model coupled with a deformed core are studied in the frame of particle-rotor model. The nearest-neighbor distribution of energy levels and spectral rigidity in the two-j shell are compared with those in the single-j case. The results show that the system is more regular in the two-j model than that in the single-j case.
基金Supported by the National Natural Science Foundation of China(Grant No.81173387)the Natural Science Foundation of Anhui college of TCM(Grant No.2010ZR002A)
文摘OBJECTIVE： To study the effect of Wuziyanzong treatment on the sperm quality and content of cal- cium ions （Ca2＋） in oligoasthenospermia rats. METHODS： A model of oligoasthenospermia was induced in 50 Sprague Dawley rats by treatment with tripterygium glycosides at 30 mg/kg per day for 8 weeks. They were divided randomly into a model group, a positive group （Huangjingzanyu capsule, 3.01 g/kg）, and low, medium and high dose Wuziyanzong treatment groups （2.30, 4.60, 9.20 g/kg crude drug respectively） with 10 in each group. Another 10 rats were used as a control group. The rats in the control and model groups were administered distilled water, while the rats in the remaining groups were administered Wuziyan- zong for 30 d. The epididymides were removed, spermatozoa recovered and the sperm density and viability were measured. The spermatozoa were pu- rified and the contents of Ca2~ in the cytoplasm and mitochondria were detected by flow cytometry and atomic absorption spectrometry, respectively. RESULTS： After 8 weeks of treatment with tripteryg- ium glycosides, the sperm density, sperm activity and the Ca2~ content of spermatozoa in the model rats were all significantly decreased compared with the control group （all P〈O.05）. After 30 d treatment, the sperm density and activity improved and the Ca2＋ content of sperm were increased significantly in the medium and high dose Wuziyanzong treat- ment groups in comparison with the model group （all P〈O.05）. CONCLUSION： The Wuziyanzong treatment in： creased sperm density, improved sperm viability and enhanced the content of Ca2＋ in the sperm cy- toplasm and mitochondria in this rat model of oli- goasthenospermia.
基金supported by the National Basic Research Program of China(Grant No. 2009CB929302)the National Natural Science Foundation of China (Grant No. 91121015)+1 种基金the Ministry of Education of China (GrantNo. B06011)the U.S. National Science Foundation (Grant No. PHY-0925174)
文摘Kitaev model has both Abelian and non-Abelian anyonic excitations. It can act as a starting point for topological quantum compu- tation. However, this model Hamiltonian is difficult to implement in natural condensed matter systems. Here we propose a quantum simulation scheme by constructing the Kitaev model Hamiltonian in a lattice of coupled cavities with embedded A-type three-level atoms. In this scheme, several parameters are tunable, for example, via external laser fields. Importantly, our scheme is based on currently existing technologies and it provides a feasible way of realizing the Kitaev model to explore topological excitations.
文摘The Hooke＇s atoms with two or more than two electrons give rise to an interesting quantum mechanical model with valuable practical applications. In this work, we study the electronic properties near the origin of the harmonic potential. It is seen that the spherically averaged density, ~, exhibits an interesting character -- it has only even order terms in its small r expansion. The spherical average of the Hartree potential, ~, and the spherical average of the Kohn-Sham exchange-correlation potential, 9~c, are also shown to have the same property -- all odd order terms in their expansions vanish. F^rthermore, the analysis and results extend also to the case of two-dimensional models. While only models interacting via. the Coulomb potential are primarily considered in the article, the results also extend to models interacting via. other potentials （viz. Van der Waals potential）.
