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Trapped Ion Quantum Computing
Optimally Controlled Storage of a Qubit in an Inhomogeneous Spin Ensemble
arXiv
Authors: Rahul Gupta, Florian Mintert, Himadri Shekhar Dhar
Year
2026
Paper ID
48761
Status
Preprint
Abstract Read
~2 min
Abstract Words
83
Citations
N/A
Abstract
The storage of quantum information in spin-ensembles is limited by practically unavoidable inhomogeneous broadening, and the macroscopic number of spins in such an ensemble makes the design of control solutions to increase the coherence time a challenging task. Together with a concurrently developed Krylov theory that allows us to treat the control problem efficiently, we design optimal cavity modulation for such spin ensembles that achieve an order of magnitude enhancement in qubit lifetime compared to the losses due to inhomogeneity and cavity decay.
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- The storage of quantum information in spin-ensembles is limited by practically unavoidable inhomogeneous broadening, and the macroscopic number of spins in such an ensemble...
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