Neutron Interferometry

by Chantal Roth

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Neutron Interferometry - Spin 1/2 vs Spin 1</title>
    <script>
    window.MathJax = {
      tex: { inlineMath: [['$', '$'], ['\\(', '\\)']] },
      svg: { fontCache: 'global' }
    };
    </script>
    <script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>

    <style>
        body { margin: 0; overflow: hidden; background-color: #f4f6f9; font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; }
        
        /* --- 1. Top Button (Theory) --- */
        #top-bar {
            position: absolute;
            top: 20px;
            right: 20px; 
            z-index: 10;
        }
        .btn-info {
            background: #0056b3;
            color: white;
            border: none;
            padding: 10px 20px;
            font-size: 14px;
            font-weight: bold;
            border-radius: 30px;
            cursor: pointer;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            transition: transform 0.2s;
            display: flex; align-items: center; gap: 8px;
        }
        .btn-info:hover { transform: scale(1.05); background: #004494; }

        /* --- 2. Permanent Quick Info Panel (Left) --- */
        #quick-info {
            position: absolute;
            top: 20px;
            left: 20px;
            width: 340px;
            background: rgba(255, 255, 255, 0.95);
            border: 1px solid #ccc;
            border-radius: 12px;
            padding: 20px;
            color: #333;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
            z-index: 5;
        }
        #quick-info h1 { margin: 0 0 10px 0; font-size: 1.2em; color: #0056b3; }
        #quick-info p { font-size: 0.9em; line-height: 1.4em; margin-bottom: 8px; color: #555; }
        
        .highlight-box {
            background: #eef7ff;
            border-left:...