Vortex-phonon interaction
Vortex-phonon interaction
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涡旋-声子相互作用
DOI:
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发表时间:
2005
期刊:
影响因子:
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通讯作者:
B. Svistunov
中科院分区:
文献类型:
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作者:
E. Kozik;B. Svistunov
Kelvin waves--helical waves on quantized vortex lines--are the normal modes of vortices in a superfluid. At zero temperature, the only dissipative channel of vortex dynamics is phonon emission. Starting with the hydrodynamic action, we derive the Hamiltonian of vortex-phonon interaction, thereby reducing the problem of the interaction of Kelvin waves with sound to inelastic elementary excitation scattering. On the basis of this formalism, we calculate the rate of sound radiation by superfluid turbulence at zero temperature and estimate the value of short-wavelength cutoff of the turbulence spectrum.