只能同时给一个电子制冷的电冰箱

芬兰和意大利的物理学家们正计划建造一种可以将物体冷却到10mK的微型电冰箱。这个已经部分建成的装置,通过允许单独的热电子从金属岛由隧道效应穿过一个绝热的缝隙而到达处于超导状态下的铅上。赫尔辛基技术大学的Jukka Pekola指出,这个装置有比传统隧道节点电冰箱效率高3倍多的潜力,并且,传统的隧道节点电冰箱仅能冷却至100mK。

Refrigerator cools one electron at a time (Jan 24)

http://physicsweb.org/article/news/11/1/20

Physicists in Finland and Italy have unveiled plans for a tiny refrigerator that might be able to cool objects to temperatures as low as 10 mK. The device, which has been partially built, works by allowing single "hot" electrons to tunnel through an insulating gap from a metal island to a superconducting lead. According to Jukka Pekola of the
Helsinki University of Technology, the device has the potential to be about three times more efficient than conventional tunnel-junction refrigerators, which struggle to cool below about 100 mK (Phys. Rev.Lett. 98 037201).