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Dynamical Decoupling of Spin Ensembles with Strong Anisotropic Interactions
Benjamin Merkel1, Pablo Cova Fariña1, Andreas Reiserer1
1Quantum Networks Group, Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany and Munich Center for Quantum Science and Technology (MCQST), Ludwig-Maximilians-Universität München, Fakultät für Physik, Schellingstrasse 4, D-80799 München, Germany.
Dynamical decoupling helps reduce decoherence in quantum technology due to dopant interactions, but cannot fully eliminate it in systems with anisotropic spin-spin interactions. This impacts quantum sensing and memory device miniaturization.
Area of Science:
- Quantum technology
- Condensed matter physics
- Quantum information science
Background:
- Ensembles of dopants are crucial for quantum technologies.
- Dipolar interactions between dopants limit device miniaturization and coherence.
- Anisotropic spin-spin interactions, arising from anisotropic g tensors, exacerbate decoherence.
Purpose of the Study:
- To investigate the limitation imposed by dipolar interactions on dopant ensembles in quantum devices.
- To evaluate the effectiveness of dynamical decoupling in mitigating decoherence in such systems.
- To understand the role of anisotropic spin-spin interactions in decoherence.
Main Methods:
- Theoretical modeling of dopant interactions and decoherence.
- Experimental investigation of decoherence in doped crystals.
- Application and analysis of dynamical decoupling techniques.
Main Results:
- Dynamical decoupling can alleviate, but not completely eliminate, decoherence.
- Strong anisotropic spin-spin interactions significantly contribute to decoherence.
- The g tensor anisotropy is identified as the origin of anisotropic spin-spin interactions.
Conclusions:
- Decoherence in dopant ensembles is a critical challenge for quantum technology miniaturization.
- Dynamical decoupling offers partial mitigation for decoherence in anisotropic systems.
- Findings are applicable to quantum sensing, microwave-to-optical conversion, and quantum memory systems.
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