Theory of a supernarrow roton absorption line in the spectrum of a disk-shaped microwave resonator

Vadim M. Loktev; Maksim D. Tomchenko

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Theory of a supernarrow roton absorption line in the spectrum of a disk-shaped microwave resonator

机译：圆盘形微波谐振器频谱中超窄子振子吸收线的理论

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We calculate the probability of the creation of a circular phonon (c-phonon) in He II by a c-photon of the resonator. It is shown that this probability has sharp maxima at frequencies, where the effective group velocity of the c-phonon is equal to zero. For He II, these frequencies correspond to a roton and a maxon. From the probability of the c-roton birth, we calculate the roton linewidth which is found to approximately agree with the experimental one.

机译：我们计算了通过谐振器的c光子在He II中创建圆形声子（c声子）的可能性。结果表明，该概率在c声子的有效群速度等于零的频率处具有极大的最大值。对于He II，这些频率对应于一个roton和一个maxon。从c-roton诞生的概率，我们计算出roton线宽，发现该线宽与实验值大致吻合。

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《Physical review》 |2010年第17期|p.172501.1-172501.4|共4页
作者
Vadim M. Loktev; Maksim D. Tomchenko;
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Bogoliubov Institute for Theoretical Physics, 14-b Metrologichna Street, Kyiv 03680, Ukraine;

Bogoliubov Institute for Theoretical Physics, 14-b Metrologichna Street, Kyiv 03680, Ukraine;

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Theory of a supernarrow roton absorption line in the spectrum of a disk-shaped microwave resonator

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