Vacuum CO2 Sealing of Monolithic Silica Components for Quantum Applications

Quantum technologies promise to utilize the fundamental principles of quantum mechanics to deliver unparalleled possibilities for enhanced data security through quantum cryptography [1], increased computational power via quantum computing [2], and ultra-precise measurement with quantum sensing [3]. Among these complex quantum physics-based systems, alkali atom-based ones are nowadays considered as the most mature platform, bridging the gap to industry in the three pre-cited quantum technology pillars. A new paradigm of these systems can be achieved through geometries (alkali-vapor filled cells, fibers or capillaries) that allow atom/photon interaction in forced transverse geometries by confining the atoms and the optical mode in a waveguide and this potentially over centimeters in length. Applications of these confined vapor sealed are various and comprise (not extensively) quantum spectroscopy [4], electromagnetic field measurement [5], or even refrigeration [6]. Anyway, for obvious reasons of engineering capabilities and intrinsic complexity of these quantum systems these has been up to now reserved to a few academic proof of principle.