Scattering length

The scattering length in quantum mechanics describes low-energy scattering. It is defined as the following low-energy limit,

where $a$ is the scattering length, $k$ is the wave number, and $\delta(k)$ is the s-wave phase shift. The elastic cross section, $\sigma_e$ , at low energies is determined solely by the scattering length,

单词	Scattering length
释义	Scattering length 英语百科 Scattering length The scattering length in quantum mechanics describes low-energy scattering. It is defined as the following low-energy limit, where $a$ is the scattering length, $k$ is the wave number, and $\delta(k)$ is the s-wave phase shift. The elastic cross section, $\sigma_e$ , at low energies is determined solely by the scattering length,
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