Author

R. Van Beeumen

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Preprint Sep 2026

Efficient Calculation of Equilibrium Correlation Functions

A majority of measurable dynamic quantities of a physical system is described as an equilibrium correlation function of the form $G_{AB}(t-t') = \left$, where $t'$ represents the impact time and $t$ represents the response time. Conventional quantum algorithms to compute such quantities via Hamiltonian simulation such...

Yi-Zhi Shen, R. Van Beeumen, Wibe A. de Jong et al. · 0 citations

Preprint Oct 2026

Block encoding of semiseparable matrices via their generators

We present an explicit quantum circuit that constructs a block encoding of a generator-representable semiseparable (one-pair) matrix directly from its two generators. For an $N\times N$ semiseparable matrix with $N=2^{n}$, the circuit uses $2n+2$ ancilla qubits and has $O({\rm polylog} N)$ depth, and it realizes a $(2\...

Giacomo Antonioli, G. M. del Corso, R. Van Beeumen · 1 citation