Kavli Affiliate: Mamoru Matsuo
| First 5 Authors: Hiroyuki Tajima, Daigo Oue, Mamoru Matsuo, Takeo Kato,
| Summary:
We theoretically propose a method to identify the tunneling current carrier
in interacting fermions from nonequilibrium noise in the
Bardeen-Cooper-Schrieffer to Bose–Einstein condensate crossover. The
noise-to-current ratio, the Fano factor, can be a crucial probe for the current
carrier. Bringing strongly-correlated fermions into contact with a dilute
reservoir produces a tunneling current in between. The associated Fano factor
increases from one to two as the interaction becomes stronger, reflecting the
formation of the preformed Cooper pairs or bound molecules.
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