By means of numerical simulation, we reveal a phenomenon which is due to decoherence induced by chaotic motion of a large environment. We study the possibility of replacing the environmental components of the state ve...By means of numerical simulation, we reveal a phenomenon which is due to decoherence induced by chaotic motion of a large environment. We study the possibility of replacing the environmental components of the state vector of the total system by some randomly-chosen vectors in the Hilbert space of the environment when decoherence has happened. It is shown that, in the future evolution, the reduced density matrices obtained in this way are quite close to those computed from the exact, continuous Schr6dinger evolution of the total system. Similar results are also found in the case that the Hamiltonian is changed at the time of replacing components.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 11275179 and 10975123the National Basic Research Program of China under Grant No 2013CB921800
文摘By means of numerical simulation, we reveal a phenomenon which is due to decoherence induced by chaotic motion of a large environment. We study the possibility of replacing the environmental components of the state vector of the total system by some randomly-chosen vectors in the Hilbert space of the environment when decoherence has happened. It is shown that, in the future evolution, the reduced density matrices obtained in this way are quite close to those computed from the exact, continuous Schr6dinger evolution of the total system. Similar results are also found in the case that the Hamiltonian is changed at the time of replacing components.
