Interference of Cooper Pairs Emitted from Independent Superconductors
Mauro Iazzi, Kazuya Yuasa
TL;DR
This paper explores the interference phenomena of electrons emitted from independent superconductors, distinguishing between Hanbury Brown and Twiss effects and Cooper pair interference, akin to Bose-Einstein condensate interference.
Contribution
It clarifies the nature of interference in electron emissions from independent superconductors, highlighting the first-order Cooper pair interference as a novel phenomenon.
Findings
Interference in antibunching correlation is due to Hanbury Brown and Twiss effect.
Positive correlation interference is intrinsic to superconductivity, involving Cooper pairs.
The Cooper pair interference is analogous to Bose-Einstein condensate interference.
Abstract
We discuss the interference in the two-particle distribution of the electrons emitted from two independent superconductors. It is clarified that, while the interference appearing in the antibunching correlation is due to the Hanbury Brown and Twiss effect, that in the positive correlation due to superconductivity is intrinsically different and is nothing but the first-order interference of Cooper pairs emitted from different sources. This is the equivalent of the interference of two independent Bose-Einstein condensates.
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