Stabilized Parametric Cooper-Pair Pumping in a Linear Array of Coupled Josephson Junctions

Erratum: Cooper pair splitting in parallel quantum dot Josephson junctions

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Cooper pair splitting in parallel quantum dot Josephson junctions

Devices to generate on-demand non-local spin entangled electron pairs have potential application as solid-state analogues of the entangled photon sources used in quantum optics. Recently, Andreev entanglers that use two quantum dots as filters to adiabatically split and separate the quasi-particles of Cooper pairs have shown efficient splitting through measurements of the transport charge but t...

Resonator coupled Josephson junctions; parametric excitations and mutual locking

ac Josephson effect and resonant Cooper pair tunneling emission of a single Cooper pair transistor.

We measure the high-frequency emission of a single Cooper pair transistor (SCPT) in the regime where transport is only due to tunneling of Cooper pairs. This is achieved by coupling on chip the SCPT to a superconductor-insulator-superconductor junction and by measuring the photon assisted tunneling current of quasiparticles across the junction. This technique allows a direct detection of the ac...

Controlled Single-Cooper-Pair Charging Effects in a Small Josephson Junction Array

We report on measurements of single-Cooper-pair charging effects in small Josephson junction arrays, and the experimental techniques that were used. We succeeded in having complete control over the array’s electrostatic parameters; offset charges were accurately compensated, and the poisoning of 2e-periodic effects by quasiparticles was circumvented. This allowed for a controlled study of the a...