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利用啁啾激光脉冲序列,正电子束被冷却至接近绝对零度
正电子束(Ps)是一种由电子及其反粒子正电子组成的奇异原子。这种纯粹的轻子系统在基础物理学中具有重要意义,因其简单性和进行量子电动力学(QED)精确测试的潜力。然而,正电子束的短寿命以及与多普勒展宽和反冲相关的挑战使得正电子束的激光冷却一直很困难。最 ...
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