Quantum decoherence of excitons in a leaky cavity with quasimode

摘要

For the excitons in the quantum well placed within a leaky cavity, thequantum decoherence of a mesoscopically superposed states is investigated basedon the factorization theory for quantum dissipation. It is found that thecoherence of the exciton superposition states will decrease in an oscillatingform when the cavity field interacting with the exciton is of the form ofquasimode. The effect of the thermal cavity fields on the quantum decoherenceof the superposition states of the exciton is studied and it is observed thatthe higher the temperature of the environment is, the shorter the decoherencecharacteristic time is.