Evolution of decoherence in a degenerate parametric-amplifier system with thermal noise
Xiang-Guo Meng, Jianming Liu, Lian-Zhen Cao +2 more
Quantum decoherence is considered a core obstacle in quantum computing; therefore, suppressing decoherence is a primary task. Based on the integral representation of the solution to the thermal master equation, we focus on the evolution of decoherence in a degenerate parametric amplifier system described by a known Hamiltonian in a thermal environment. We also investigate the evolution of the photon number distribution, Wigner distribution, and von Neumann entropy in a thermal environment. This work can provide a theoretical reference for experimental studies of degenerate parametric amplifier systems.
Frontiers of Physics•Jan 1, 2026•0 citations