Probing Cooper pairs with Franson interferometry
Vittorio Giovannetti, Kazuya Yuasa
DOI 10.1103/PhysRevB.86.115429 · Physical Review B
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Abstract
A setup based on the Franson optical interferometer is analyzed, which allows us to detect the coherence properties of Cooper pairs emerging via tunneling from a superconductor in contact with two one-dimensional channels. By tuning the system parameters we show that both the internal coherence of the emitted Cooper pairs, which is proportional to Pippard's length, and the de Broglie wavelength of their center-of-mass motion can be measured via current-current correlation measurements.
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