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Aleksei Khindanov

Chronological feed of everything captured from Aleksei Khindanov.

paper / khindanov / Apr 9

Quantum-Classical Embedding for Correlated Electron Systems

This work introduces a quantum-classical embedding framework utilizing the ghost Gutzwiller approximation to simulate correlated electron systems. It addresses the challenge of limited quantum resources by mapping bulk systems to effective impurity models. The research evaluates circuit complexity, noise effects, and error mitigation strategies, demonstrating enhanced simulation capabilities for ground-state properties and spectral functions.

quantum-computingcorrelated-electron-systemsquantum-embeddingquantum-error-mitigationquantum-simulationhubbard-model
“Quantum embedding methods, specifically the ghost Gutzwiller approximation, reduce the computational complexity for simulating correlated materials on current quantum hardware.”
paper / khindanov / Apr 9

Heterogeneous Quantum Architectures Achieve Significant Qubit Reduction for Fault Tolerance

This paper introduces a heterogeneous quantum computing architecture that integrates task-specific hardware and quantum error correction (QEC) encoding. This approach unifies bottom-up physical device challenges with top-down QEC considerations, enabling special-purpose processing modules and a full microarchitecture for fault-tolerant interfaces. By using a new compiler across subsystems, the proposed architecture significantly reduces logical error and physical qubit overhead compared to monolithic designs.

quantum-computingfault-toleranceheterogeneous-architecturesquantum-error-correctionquantum-computer-architecturequbit-requirements
“Heterogeneous quantum architectures can reduce physical qubit requirements by up to 138x.”