Spin-Lattice Relaxation Decoherence Suppression in Vanishing Orbital Angular Momentum Qubits

Christian D Buch; Krishnendu Kundu; Jonathan J Marbey; Johan van Tol; Høgni Weihe; Stephen Hill; Stergios Piligkos

doi:10.1021/jacs.2c07057

Spin-Lattice Relaxation Decoherence Suppression in Vanishing Orbital Angular Momentum Qubits

J Am Chem Soc. 2022 Sep 28;144(38):17597-17603. doi: 10.1021/jacs.2c07057. Epub 2022 Sep 14.

Authors

Christian D Buch¹, Krishnendu Kundu², Jonathan J Marbey², Johan van Tol², Høgni Weihe¹, Stephen Hill², Stergios Piligkos¹

Affiliations

¹ Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen, Denmark.
² National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States.

PMID: 36106369
DOI: 10.1021/jacs.2c07057

Abstract

Multifrequency electron paramagnetic resonance spectroscopy on oriented single crystals of magnetically dilute Gd(III) ions in Gd_0.004Y_0.996(trensal) is used to determine the Hamiltonian parameters of the ground ⁸S_7/2 term and its phase memory time, T_m, characterizing its coherent spin dynamics. The vanishing orbital angular momentum of the ⁸S_7/2 term makes it relatively insensitive to spin-lattice relaxation mediated by magnetoelastic coupling and leads to a T_m of 12 μs at 3 K, which is not limited by spin-lattice relaxation.