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    <title>MathJax math/tex Script Elements</title>
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    <article>
        <h1>MathJax math/tex Script Elements</h1>

        <p>We call these energy differences <script type="math/tex">E_u</script> and <script type="math/tex">E_l</script> (subscripts refer to "upper" and "lower"), or in units of frequency, <script type="math/tex">f_u</script> and <script type="math/tex">f_l</script> (where <script type="math/tex">E_{l,u} = hf_{l,u}</script>).</p>

        <p>As a special case, when <script type="math/tex">\mathbf{B}</script> is aligned with the NV axis (i.e., <script type="math/tex">\theta = 0</script>), the above relation reduces to:</p>

        <script type="math/tex; mode=display">
f_u = D+\gamma B \quad \text{and} \quad f_l = D-\gamma B.
</script>

        <p>The key result is:</p>

        <script type="math/tex; mode=display">
B= \frac{1}{\sqrt{3}\gamma}\sqrt{f_u^2+f_l^2-f_u f_l-D^2}
</script>

        <p>Here, <script type="math/tex">\gamma = 28</script> GHz/T is the gyromagnetic ratio.</p>
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