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arXiv quant-ph/0203019quant-phcs.CCnlin.CD
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不可积量子系统波函数演化的不可预测性

Unpredictability of wave function's evolution in nonintegrable quantum systems

I. B. Ivanov

摘要:

结果表明,由于初等计算操作$\mathcal O(T)\sim T^α$的数目迅速增长,在很长时间T内,不可积量子系统中波函数的演化是不可预测的.另一方面,可积系统中波函数的演化可以用快速算法$\mathcal O(T)\sim (log_2 T)^β$在短时间内预测,因此它们的动力学具有算法上的“可压缩性”。在我们的方法中,可积系统和不可积系统之间的差异对于经典系统和量子系统看起来是相同的。因此,在时间间隔T内预测系统状态所需的最小位运算次数$\mathcal O(T)$可以作为混沌的普适标志。

英文摘要:

It is shown that evolution of wave functions in nonintegrable quantum systems is unpredictable for a long time T because of rapid growth of number of elementary computational operations $\mathcal O(T)\sim T^α$. On the other hand, the evolution of wave functions in integrable systems can be predicted by the fast algorithms $\mathcal O(T)\sim (log_2 T)^β$ for logarithmically short time and thus there is an algorithmic "compressibility" of their dynamics. The difference between integrable and nonintegrable systems in our approach looks identically for classical and quantum systems. Therefore the minimal number of bit operations $\mathcal O(T)$ needed to predict a state of system for time interval T can be used as universal sign of chaos.

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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