Scientific Results

Measurements of single-state and state-ensemble lifetimes of high-lying Rb Rydberg levels

Year: 2019

Authors: Morsch O.,

Autors Affiliation: [ 1 ]‎ Univ Pisa, Dipartimento Fis E Fermi, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
[ 2 ]‎ CNR, INO, Via G Moruzzi 1, I-56124 Pisa, Italy
[ 3 ]‎ Novosibirsk State Univ, Rzhanov Inst Semicond Phys SB RAS, Novosibirsk 630090, Russia
[ 4 ]‎ Novosibirsk State Univ, Novosibirsk 630090, Russia
[ 5 ]‎ Novosibirsk State Tech Univ, Novosibirsk 630072, Russia

Abstract: We demonstrate a hybrid method based on field ionization and state-selective deexcitation capable of measuring the lifetimes of high-lying Rydberg levels. For nS Rydberg states of Rb atoms with principal quantum number 60 <= n <= 88, we measure both the lifetimes of single target states and those of the ensembles of Rydberg states populated via blackbody-radiation-induced transitions. We find good overall agreement with numerical calculations of the expected lifetimes in both cases. However, for the target-state lifetimes, we find a local deviation towards shorter lifetimes for states around n = 72, which we interpret as a signature of a modified blackbody spectrum in the finite volume in which our experiments take place. Journal/Review: PHYSICAL REVIEW A

Volume: 100      Pages from: 030501  to: 030501

KeyWords: Rydberg atoms; black-body radiation;
DOI: 10.1103/PhysRevA.100.030501