Carregant...
Miniatura

Tipus de document

Article

Versió

Versió publicada

Data de publicació

Llicència de publicació

cc-by (c) Bravo Prieto, Carlos et al., 2020
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/196067

Scaling of variational quantum circuit depth for condensed matter systems

Títol de la revista

Director/Tutor

ISSN de la revista

Títol del volum

Resum

We benchmark the accuracy of a variational quantum eigensolver based on a finite-depth quantum circuit encoding ground state of local Hamiltonians. We show that in gapped phases, the accuracy improves exponentially with the depth of the circuit. When trying to encode the ground state of conformally invariant Hamiltonians, we observe two regimes. A finite-depth regime, where the accuracy improves slowly with the number of layers, and a finite-size regime where it improves again exponentially. The cross-over between the two regimes happens at a critical number of layers whose value increases linearly with the size of the system. We discuss the implication of these observations in the context of comparing different variational ansatz and their effectiveness in describing critical ground states.

Citació

Citació

BRAVO PRIETO, Carlos, LUMBRERAS ZARAPICO, Josep, TAGLIACOZZO, Luca, LATORRE, José ignacio. Scaling of variational quantum circuit depth for condensed matter systems. _Quantum_. 2020. Vol. 4. [consulta: 29 de gener de 2026]. ISSN: 2521-327X. [Disponible a: https://hdl.handle.net/2445/196067]

Exportar metadades

JSON - METS

Compartir registre