The analogy between the theory of 2-level atoms and the relevant classical theory is ex-amined in detail. This familiar analogy shown in the Heisenberg picture will be damaged,when we calculate the values of physical ...The analogy between the theory of 2-level atoms and the relevant classical theory is ex-amined in detail. This familiar analogy shown in the Heisenberg picture will be damaged,when we calculate the values of physical quantities in specific states. This damage has rela-tion with the definition of state. If we use a pair of vectors to define the state of a system,that analogy can be kept without damage.展开更多
In the context of quantum information,we investigate extensively some important classes of a general form of a two-qubit system under Lorentz transformation.It is shown Lorentz transformation causes a decay of entangl...In the context of quantum information,we investigate extensively some important classes of a general form of a two-qubit system under Lorentz transformation.It is shown Lorentz transformation causes a decay of entanglement and consequently information loses.On the other hand,it generates entangled states between systems prepared initially in a separable states.The partial entangled states are more robust under Lorentz transformation than maximally entangled states.Therefore the rate of information lose is larger for maximum entangled states compared with that for partially entangled states.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘The analogy between the theory of 2-level atoms and the relevant classical theory is ex-amined in detail. This familiar analogy shown in the Heisenberg picture will be damaged,when we calculate the values of physical quantities in specific states. This damage has rela-tion with the definition of state. If we use a pair of vectors to define the state of a system,that analogy can be kept without damage.
文摘In the context of quantum information,we investigate extensively some important classes of a general form of a two-qubit system under Lorentz transformation.It is shown Lorentz transformation causes a decay of entanglement and consequently information loses.On the other hand,it generates entangled states between systems prepared initially in a separable states.The partial entangled states are more robust under Lorentz transformation than maximally entangled states.Therefore the rate of information lose is larger for maximum entangled states compared with that for partially entangled states.