All-electrical generation and control of odd-frequency s-wave Cooper pairs in double quantum dots
Pablo Burset, Bo Lu, Hiromi Ebisu, Yasuhiro Asano, Yukio Tanaka
DOI 10.1103/PhysRevB.93.201402 · Physical Review B
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Abstract
We propose an all-electrical experimental setup to detect and manipulate the amplitude of odd-frequency pairing in a double quantum dot. The odd-frequency pair amplitude is induced from the breakdown of orbital symmetry when Cooper pairs are injected in the double dot with electrons in different dots. When the dot levels are aligned with the Fermi energy, i.e., on resonance, nonlocal Andreev processes are directly connected to the presence of odd-frequency pairing. Therefore, their amplitude can be manipulated by tuning the level positions. The detection of nonlocal Andreev processes by conductance measurements contributes a direct proof of the existence of the odd-frequency pair amplitude and is available using current experimental techniques.
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