Laser induced PT-symmetry breaking in the fluctuations of electronic fluids

Autor(es)

Aquino, Rui ; Silvano, Nathan O. ; Barci, Daniel G.

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW B; v. 110, n. 8, p. 8-pg., 2024-08-23.

Resumo

Electronic fluids can display exciting dynamical properties. In particular, due to Landau damping, the collective-mode spectrum of an electronic system with multipolar interactions is non-Hermitian, and can present non-Hermitian degeneracies called exceptional points. In this work, we want to explore the dynamical properties of these degeneracies using laser control. We show that by using a light pulse, we can control the collective-mode spectrum and tune a non-Hermitian PT phase transition in which two exceptional points annihilate each other. At this transition, the gap closes with a cubic root signature, which defines a third-order exceptional point. (AU)

• Processo FAPESP: 23/05765-7 - Flutuações e não-hermiticidade em materiais nemáticos
• Beneficiário: Rui Aquino dos Santos da Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado