Digital-analog quantum computation with arbitrary two-body Hamiltonians Garcia de Andoin, Mikel Sáiz, Álvaro Pérez Fernández, Pedro Lamata, Lucas Oregi, Izaskun Sanz, Mikel Digital-analog quantum computing is a computational paradigm which employs an analog Hamiltonian resource together with single-qubit gates to reach universality. Here, we design a new scheme which employs an arbitrary two-body source Hamiltonian, extending the experimental applicability of this computational paradigm to most quantum platforms. We show that the simulation of an arbitrary two-body target Hamiltonian of n qubits requires O(n2) analog blocks with guaranteed positive times, providing a polynomial advantage compared to the previous scheme. Additionally, we propose a classical strategy which combines a Bayesian optimization with a gradient descent method, improving the performance by ∼55% for small systems measured in the Frobenius norm. 2024-05-22T07:01:27Z 2024-05-22T07:01:27Z 2024-03-14 journal article Mikel Garcia-de-Andoin, Álvaro Saiz, Pedro Pérez-Fernández, Lucas Lamata, Izaskun Oregi, and Mikel Sanz. Digital-analog quantum computation with arbitrary two-body Hamiltonians. Physical Review Research 6, 013280 (2024) [10.1103/PhysRevResearch.6.013280] https://hdl.handle.net/10481/91944 10.1103/PhysRevResearch.6.013280 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional American Physical Society