Author

M. Samar

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Preprint Oct 2026

Quantum computation of energy level degeneracy and thermodynamical properties of spin systems

We propose a hybrid quantum-classical method for reconstructing energy-level degeneracies and thermodynamic properties of spin systems. A single ancilla qubit is used to measure the partition function at imaginary inverse temperatures. For spectra lying on a known equally spaced energy grid, the inverse discrete Fourie...

V. Tkachuk, M. Samar · 0 citations

Preprint Oct 2026

Correlation-Based Measurement of Entanglement in Rank-2 Mixed States

We study correlation-based entanglement evaluation in rank-2 mixed states of two- and multi-qubit systems. The relevant two-dimensional subspace is treated as a logical qubit embedded in the physical Hilbert space, and factorizable realizations of its logical Pauli operators are classified. For two qubits, this yields...

M. Samar, V. Tkachuk · 0 citations