Martinez-Azcona Pablo, Kundu Aritra, Saxena Avadh, Del Campo Adolfo, Chenu Aurélia
University of Luxembourg, Department of Physics and Materials Science, L-1511 Luxembourg.
Los Alamos National Laboratory, Theoretical Division, Los Alamos, New Mexico 87545, USA.
Phys Rev Lett. 2025 Jul 2;135(1):010402. doi: 10.1103/5ksl-tjjm.
We study the quantum dynamics generated by a non-Hermitian Hamiltonian subject to stochastic perturbations in its anti-Hermitian part, describing fluctuating gains and losses. The dynamics averaged over the noise is described by an "antidephasing" master equation. We characterize the resulting state evolution and analyze its purity. The properties of such dynamics are illustrated in a stochastic dissipative qubit. Our analytical results show that adding noise allows for a rich control of the dynamics, stabilizing the lossy state and making state purification possible to a greater variety of steady states.
我们研究由一个非厄米哈密顿量产生的量子动力学，该哈密顿量的反厄米部分受到随机扰动，描述了波动的增益和损耗。对噪声进行平均后的动力学由一个“反位相”主方程描述。我们刻画了由此产生的态演化并分析了其纯度。这种动力学的性质在一个随机耗散量子比特中得到了说明。我们的分析结果表明，添加噪声能够对动力学进行丰富的控制，稳定有损耗的状态，并使态纯化能够达到更多种类的稳态。
