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Teletransporte quântico na presença de ruído
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Física - PPGFCâmpus São Carlos, 2016-04-01)
The main focus of this work is to explore the feasibility of conducting the
teleportation protocol in scenarios where the presence of an external environment
reduces the purity of the input state and the transmission ...
Ruídos e processos quânticos fundamentais em íons aprisionados e ondas propagantes
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Física - PPGF, 2002-07-22)
In this work we present a proposal protocol for engineering arbitrary motional states of trapped ions.Our scheme is based on both techniques of quantum state sculpture and projection synthesis. Next, we investigate the ...
Decoerência de sistemas quânticos induzida por cadeias de spin
(Universidade Federal de Minas GeraisBrasilICX - DEPARTAMENTO DE FÍSICAPrograma de Pós-Graduação em FísicaUFMG, 2015-03-13)
In this work we studied the decoherence in a central quantum system S uniformly coupled to a reservoir R, chosen as a quantum Ising chain with transverse field. Initially, we review the usual approach to diagonalize the ...
Abordagem via integrais de trajetória do processo de troca e dissipação de energia num sistema composto por dois osciladores harmônicos dissipativos acoplados - o modelo duplicado de Caldeira & Leggett.
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Física - PPGF, 2005-03-11)
In this work, we analyse the dissipation and interchange of energy in a
system composed by two harmonic oscillators, each one associated with a thermal
reservoir.
To this end, we employ the Caldeira & Leggett approach, ...
Decoherence and intertheory relations in quantum realismDecoherencia y relaciones interteóricas en el realismo cuántico
(Universidad Nacional de QuilmesUniversidad Nacional de Tres de Febrero, 2019-04-01)
The complex relation between quantum mechanics and classical mechanics is crucial in the philosophy of modern physics, and it cuts across current quantum physics. This paper is divided in two parts. In the first part I ...
Engenharia de interações e de reservatórios
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Física - PPGF, 2008-05-17)
In this work we first present a protocol to build effective interactions between two cavity modes, considering a two-level atom under the action of classical fields. Bilinear Hamiltonians associated with parametric up- and ...
Processos de relaxação em sistemas quânticos e álgebra de operadores não-lineares
(Universidade Federal de São CarlosBRUFSCarPrograma de Pós-Graduação em Física - PPGF, 2006-02-24)
On this thesis some aspects of relaxation processes and decoherence processes using deformed
algebras of the harmonic oscillator, particularly the generalized deformed algebra (GDA algebra)
and Kerr algebra were studied.Two ...