Single Flux Transistor: the controllable interplay of Coherent Quantum Phase Slip and Flux quantization

TL;DR

This paper introduces the Single Flux Transistor, a superconducting device demonstrating the duality between quantum phase slip and flux quantization, with experimental evidence of magnetic modulation and hysteresis in its transport properties.

Contribution

The paper presents the first experimental demonstration and theoretical modeling of the Single Flux Transistor, highlighting its duality to the Single Cooper Pair Transistor and its unique quantum properties.

Findings

Periodic modulation of critical voltage by magnetic field

Hysteretic current-voltage characteristics

Evidence of charge carrier self-heating effects

Abstract

The Single Cooper Pair Josephson Transistor is a device that exhibits at the same time charge quantization and phase coherence. Coherent quantum phase slip phenomenon is "dual" the Josephson phase coherence while the charge quantization is dual to the flux quantization. We present the experimental demonstration and the theoretical description of a new superconducting device - Single Flux Transistor, which is dual to the Single Cooper Pair Transistor. Our transport measurements show the periodic modulation of the critical voltage by the external magnetic field. The obtained current-voltage characteristics show the hysteretic behavior, which we attribute to the intrinsic self-heating of charge carriers.