Ground-State-Based Model Reduction with Unitary Circuits
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866911068731736064 |
|---|---|
| author | Jiang, Shengtao White, Steven R. |
| author_facet | Jiang, Shengtao White, Steven R. |
| contents | We present a method to numerically obtain low-energy effective models based on a unitary transformation of the ground state. The algorithm finds a unitary circuit that transforms the ground state of the original model to a projected wavefunction with only the low-energy degrees of freedom. The effective model can then be derived using the unitary transformation encoded in the circuit. We test our method on the one-dimensional and two-dimensional square-lattice Hubbard model at half-filling, and obtain more accurate effective spin models than the standard perturbative approach. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_10774 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ground-State-Based Model Reduction with Unitary Circuits Jiang, Shengtao White, Steven R. Strongly Correlated Electrons Quantum Physics We present a method to numerically obtain low-energy effective models based on a unitary transformation of the ground state. The algorithm finds a unitary circuit that transforms the ground state of the original model to a projected wavefunction with only the low-energy degrees of freedom. The effective model can then be derived using the unitary transformation encoded in the circuit. We test our method on the one-dimensional and two-dimensional square-lattice Hubbard model at half-filling, and obtain more accurate effective spin models than the standard perturbative approach. |
| title | Ground-State-Based Model Reduction with Unitary Circuits |
| topic | Strongly Correlated Electrons Quantum Physics |
| url | https://arxiv.org/abs/2504.10774 |