Phonon-blocked junction refrigerators for cryogenic quantum devices

TL;DR

This paper explores the potential of phonon-blocked semiconductor-superconductor junctions as compact, solid-state refrigerators capable of reaching sub-1 K temperatures, which could significantly advance cryogenic quantum device technology.

Contribution

It investigates the fundamental performance limits of phonon-blocked junction refrigerators, highlighting their potential for miniaturized cryogenic cooling solutions in quantum technology.

Findings

Performance limits of phonon-blocked junction refrigerators analyzed

Potential for sub-1 K cooling with solid-state devices demonstrated

Implications for miniaturized cryogenic quantum systems discussed

Abstract

Refrigeration is an important enabler for quantum technology. The very low energy of the fundamental excitations typically utilized in quantum technology devices and systems requires temperature well below 1 K. Expensive cryostats are utilized in reaching sub-1 K regime and solid-state cooling solutions would revolutionize the field. New electronic micro-coolers based on phonon-blocked semiconductor-superconductor junctions could provide a viable route to such miniaturization. Here, we investigate the performance limits of these junction refrigerators.