Banca de QUALIFICAÇÃO: PEDRO HENRIQUE MACEDO BARROS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: PEDRO HENRIQUE MACEDO BARROS
DATA: 28/08/2024
HORA: 08:00
LOCAL: Remota
TÍTULO: Decoerência induzida pelo efeito Unruh em diferentes cenários.
PALAVRAS-CHAVES: Accelerated detectors; Unruh effect; Quantum decoherence; Dispersive vacuum; Gravitational waves.
PÁGINAS: 67
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Física
RESUMO:

We investigate the behavior of quantum decoherence induced by the
Unruh effect on wave particle properties, in the dispersive vacuum and in the
gravitational wave background, all using two setups: a quantum interferometric
circuit and a uniformly accelerated single qubit. In both systems, we use the
formalism of the evolution of the density matrix of the detector-field system,
where after the interaction the degrees of freedom of the field are traced out to
obtain the reduced density matrix of the detector. We present an alternative
approach to explore the effects of acceleration by examining the degradation of
quantum coherence in the interference pattern. Our investigations help to
understand the consequences of the decoherence induced by the Unruh effect
on the wave-particle duality. In the investigations using dispersive vacuum, we
find that decoherence increases as the vacuum becomes more dispersive due
to the increase in the modification order in the dispersion relation, and this
happens because the dispersive vacuum amplifies the effects of quantum
fluctuations that are captured by the detector when interacting with the field. In
the gravitational wave background, our results indicate that the gravitational
wave transfers energy to the internal states of the detector, causing, together
with the Unruh effect, changes in them, amplifying the decoherence of the
system. This amplification occurs when the polarization modes of the
gravitational wave are in resonance and have modulated amplitudes.

MEMBROS DA BANCA:
Interno - 1780191 - FRANCISCO ERONI PAZ DOS SANTOS
Presidente - 3331689 - HELDER ALEXANDER SANTOS E COSTA
Externo à Instituição - NATÁLIA SALOMÉ MÓLLER - UNINTER
Externo ao Programa - 010.364.693-01 - OLÍMPIO PEREIRA DE SÁ NETO - UESPI