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E. Sjöqvist

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Preprint Sep 2026

Weighted Berry curvature and global geometry of mixed quantum states

We examine the geometric interpretation of the quantum geometric tensor proposed in [Phys. Rev. B {\bf 110}, 035404 (2024)] for mixed quantum states, focusing on its imaginary part, which is proportional to a weighted sum of the Berry curvatures of the eigenstates of the density operator. While the real part naturally...

Dominik Kuczyński, E. Sjöqvist · 0 citations
Preprint Sep 2026

$d$-pod realization of nonadiabatic holonomic quantum computation

Holonomic quantum computation (HQC) realizes quantum gates through non-Abelian geometric phases, providing an experimentally accessible approach to quantum control. While the nonadiabatic HQC framework has been extensively developed for three-level $\Lambda$ systems encoding qubits, its systematic extension to higher-d...

O. Axelsson, C. Fälth, Elias Henriksson Lindberg et al. · 0 citations

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