Antihydrogen was first produced in the lab in 1995 and in 2011 it was successfully trapped for longer periods. From there, one step at a time, physicists have been overcoming technical challenges to recently achieve a milestone: the laser cooling of antihydrogen.

中文翻译：

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从捕集到激光冷却抗氢

抗氢最早于1995年在实验室生产，2011年成功被捕获了更长的时间。从那时起，物理学家一次只迈出了一步，克服了技术挑战，以实现最近的一个里程碑：激光冷却抗氢。