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arXiv quant-ph/9810023quant-phnlin.SIsolv-int
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非线性von Neumann型方程:Darboux不变性和谱

Nonlinear von Neumann-type equations: Darboux invariance and spectra

Maciej Kuna, Marek Czachor, Sergiej B. Leble

摘要:

广义Euler-Arnold-vonNeumann密度矩阵方程可以通过二元达布变换求解,给出了一种新的形式:$ρ[1]=e^{P\ln(μ/ν)}ρe^{-P\ln(μ/ν)}$其中$P=P^2$是用共轭拉克斯对显式构造的,$μ$,$ν$是复数.因此,$ρ$和$ρ[1]$的光谱相同。介绍了允许移动和重标度解的谱的变换,并讨论了一类平稳种子解。

英文摘要:

Generalized Euler-Arnold-von Neumann density matrix equations can be solved by a binary Darboux transformation given here in a new form: $ρ[1]=e^{P\ln(μ/ν)}ρe^{-P\ln(μ/ν)}$ where $P=P^2$ is explicitly constructed in terms of conjugated Lax pairs, and $μ$, $ν$ are complex. As a result spectra of $ρ$ and $ρ[1]$ are identical. Transformations allowing to shift and rescale spectrum of a solution are introduced, and a class of stationary seed solutions is discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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