Izbrane teme sodobne fizike in matematike
Quantum memory (QM) is a subject of growing scientific and technological interest due to the accelerated development of quantum networks and quantum computing. Electromagnetically induced transparency (EIT) conducted on hot atoms offers a relatively simple technological realisation of quantum memory and is therefore very promising for future scalability and mass production. This article focuses on the theoretical background of EIT-based QM and its application in research conducted at the Laboratory for cold atoms at the Jožef Stefan Institute. In the experiment, EIT in a cesium vapor at room temperature is studied, where the ground, excited, and storage states of cesium atoms form a three-level Λ-system. Successful storage of light for a few μs was demonstrated using this method.
Kvantni spomin (QM) je predmet vse večjega znanstvenega in tehnološkega zanimanja zaradi pospešenega razvoja kvantnih omrežij in kvantnega računalništva. Elektromagnetno inducirana prosojnost (EIT), izvedena na vročih atomih, omogoča tehnološko razmeroma preprosto izvedbo kvantnega spomina, kar predstavlja dobre obete za množično proizvodnjo in uporabo. Članek se osredotoča na teoretično ozadje kvantnega spomina na osnovi EIT in na uporabo tega v raziskavah, ki potekajo v Laboratoriju za hladne atome na Institutu Jožefa Stefana. Eksperiment obravnava EIT na cezijevi pari pri sobni temperaturi, kjer osnovno, vzbujeno in spominsko stanje cezijevih atomov tvorijo trinivojski sistem Λ. Raziskava uspešno demonstrira shranjevanje svetlobe za nekaj μs s to metodo.