A Proposal for the observation of nonlocal multipair production: the biSQUID - Archive ouverte HAL
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2014

A Proposal for the observation of nonlocal multipair production: the biSQUID

Résumé

We propose an all-superconducting three-terminal setup consisting in a carbon nanotube (or semiconducting nanowire) contacted to three superconducting leads. The resulting device, referred to as a " biSQUID " , is made of four quantum dots arranged in two loops of different surface area. We show how this biSQUID can prove a useful tool to probe nonlocal quantum phenomena in an interferometry setup. We study the measured critical current as a function of the applied magnetic field, which shows peaks in its Fourier spectrum, providing clear signatures of multipair Josephson processes. The device does not require any specific fine-tuning as these features are observed for a wide range of microscopic parameters – albeit with a non-trivial dependence. Competing effects which may play a significant role in actual experimental realizations are also explored.
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Dates et versions

hal-01367600 , version 1 (16-09-2016)

Identifiants

Citer

Jérôme Rech, Thibaut Jonckheere, Thierry Martin, Benoît Douçot, D. Feinberg, et al.. A Proposal for the observation of nonlocal multipair production: the biSQUID. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 90 (7), pp.075419. ⟨10.1103/PhysRevB.90.075419⟩. ⟨hal-01367600⟩
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