| Texto completo | |
| Autor(es): |
Cavalcante, Moallison F.
;
Bonanca, Marcus V. S.
;
Miranda, Eduardo
;
Deffner, Sebastian
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW B; v. 110, n. 6, p. 12-pg., 2024-08-05. |
| Resumo | |
We consider the optimal control of switching on a coupling term between two quantum many-body systems. Specifically, we (i) quantify the energetic cost of establishing a weak junction between two quantum spin-1/2 chains in finite time r and (ii) identify the energetically optimal protocol to realize it. For linear driving protocols, we find that for long times the excess (irreversible) work scales as tau(-n), where n = 1, 2 or a nonuniversal number depending on the phase of the chains. Interestingly, increasing a J(z) anisotropy in the chains suppresses the excess work, thus promoting quasiadiabaticity. The general optimal control problem is solved, employing a Chebyshev Ansatz. We find that the optimal control protocol is intimately sensitive to the chain phases. (AU) | |
| Processo FAPESP: | 22/15453-0 - Materiais quânticos correlacionados |
| Beneficiário: | Eduardo Miranda |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 20/02170-4 - Processo termodinâmicos ótimos em sistemas fora do equilíbrio |
| Beneficiário: | Marcus Vinicius Segantini Bonança |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |