Driving a double quantum dot out of equilibrium produces a high-bias resonance for two-Cooper-pair exchange with a tunable Andreev current peak whose width scales with quartet coupling and equal auto- and cross-correlations as a signature of coherent quartet oscillations.
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Nonequilibrium Cooper quartet generation in superconducting devices
Driving a double quantum dot out of equilibrium produces a high-bias resonance for two-Cooper-pair exchange with a tunable Andreev current peak whose width scales with quartet coupling and equal auto- and cross-correlations as a signature of coherent quartet oscillations.