Optical clock transition in a rare-earth-ion-doped crystal: coherence lifetime extension for quantum storage applications

23rd Congress of the International Commission for Optics

Tongning, Robert-Christopher^1 ; Chanelière, Thierry^1 ; Gouèt, Jean-Louis Le^1 ; Pascual-Winter, María Florencia^2

Laboratoire Aimé Cotton, CNRS, Université Paris-Sud and ENS Cachan, Orsay

91405, France^1

Centro Atómico Bariloche e Instituto Balseiro, CNEA, Bariloche, Río Negro

(8400), Argentina^2

关键词: Experimental analysis;    Magnetic field amplitudes;    Magnetic field orientations;    Optical clock transition;    Optical transition energies;    Quantum information storage;    Rare-earth-ion doped crystals;    Spin degrees of freedom;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/605/1/012037/pdf
DOI  :  10.1088/1742-6596/605/1/012037

来源: IOP

【 摘 要 】

Atomic clock transitions are desirable for quantum information storage and processing thanks to the protection from decoherence they provide. In the context of rare- earth-ion-doped crystals for quantum information storage, clock Zeeman or hyperfine transitions have been identified and exploited for long-lived storage in spin degrees of freedom. We present a theoretical and experimental analysis on the existence of an optical clock transition in Tm3+:YAG, in view of storage in optical coherences. The combination of a Zeeman-like term and a quadratic electronic Zeeman term in the Hamiltonian, lead to the existence of a magnetic field amplitude (12 mT) for which the derivative of the optical transition energy with respect to the field amplitude vanishes, regardless of the magnetic field orientation. We have verified this prediction through hole-burning spectroscopy experiments. In addition to that, a study of the behavior of the Hamiltonian as a function of the magnetic field orientation yields the direction for which both derivatives with respect to the magnetic field angular coordinates also vanish. The condition for an optical clock transition with three vanishing partial derivatives is met.