Experimental Observation Of The Breaking And Recombination Of Single Cooper Pairs
PHYSICAL REVIEW B(2014)
摘要
We observe the real-time breaking of single Cooper pairs by monitoring the radio-frequency impedance of a superconducting double quantum dot. The Cooper pair breaking rate in the microscale islands of our device decreases as temperature is reduced, saturating at 2 kHz for temperatures beneath 100 mK. In addition, we measure in real time the quasiparticle recombination into Cooper pairs. Analysis of the recombination rates shows that, in contrast to bulk films, a multistage recombination pathway is followed.
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关键词
single cooper pairs,recombination,breaking
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