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4.2: надтонкий гамільтоніан
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\[\begin{aligned} \hat{\mathcal{H}}_{\mathrm{HFI}}=&\left(\begin{array}{lll} \hat{S}_{x} & \hat{S}_{y} & \hat{S}_{z} \end{array}\right)\left(\begin{array}{ccc} A_{x x} & A_{x y} & A_{x z} \\ A_{y x} &...\[\begin{aligned} \hat{\mathcal{H}}_{\mathrm{HFI}}=&\left(\begin{array}{lll} \hat{S}_{x} & \hat{S}_{y} & \hat{S}_{z} \end{array}\right)\left(\begin{array}{ccc} A_{x x} & A_{x y} & A_{x z} \\ A_{y x} & A_{y y} & A_{y z} \\ A_{z x} & A_{z y} & A_{z z} \end{array}\right)\left(\begin{array}{c} \hat{I}_{x} \\ \hat{I}_{y} \\ \hat{I}_{z} \end{array}\right) \\ =& A_{x x} \hat{S}_{x} \hat{I}_{x}+A_{x y} \hat{S}_{x} \hat{I}_{y}+A_{x y} \hat{S}_{x} \hat{I}_{z} \\ &+A_{y x} \hat{S}_{y} \hat{I}_{x}+A_{y y} …