.. index:: Bessel
A(t)=A_0J_0(2\pi\nu t+\phi)
where,
A_0 is the amplitude,
\nu is the frequency of oscillation (MHz),
\phi is the phase at t=0,
and J_0(x) is the Bessel Function of the first kind, its expression is given by:
J_0(x)=\sum_{l=0}^{\infty}\frac{(-1)^l}{2^{2l}(l!)^2}x^{2l}.
.. attributes::
.. properties::
[1] Savici et al., PRB 66 (2002).
.. categories::
.. sourcelink::