超流体记忆效应
Superfluid memory effect
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中文总结 AI 辅助
该研究识别超流体中由声子散射产生的记忆效应,其由声子发射软因子控制,在超流体⁴He中产生的信号或可实验观测,为电磁和引力记忆提供实验室类比。
中文摘要 AI 辅助
我们识别出超流体中由声子散射产生的记忆效应:局域散射事件会产生远场压力脉冲,其时间积分为零但一阶时间矩非零,对应远场速度预势的永久偏移。该效应由声子发射的软因子控制,包括非线性色散的修正。在超流体⁴He中,散射宏观声子波包会产生一个信号,其估计幅度可能处于实验可及范围,从而提供电磁和引力记忆的实验室类比。
英文摘要
We identify a memory effect produced by phonon scattering in a superfluid: a localized scattering event generates a far-field pressure pulse with vanishing time integral but a nonzero first temporal moment, corresponding to a permanent shift in a prepotential for the far-field velocity. The effect is controlled by the soft factor for phonon emission, including corrections from nonlinear dispersion. In superfluid $^4$He, scattering macroscopic phonon wave packets produces a signal whose estimated magnitude may lie within experimental reach, thereby providing a laboratory analogue of electromagnetic and gravitational memory.
发表机构
- University of Victoria(维多利亚大学)
- Erwin Schrödinger Int. Institute for Mathematics and Physics, University of Vienna(维也纳大学埃尔温·薛定谔数学与物理国际研究所)
- Centro de Estudios Científicos (CECs)(科学研究中心)
- Universidad San Sebastián(圣塞巴斯蒂安大学)
- University of Vienna(维也纳大学)
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