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Fases geométricas e invariantes dinâmicos em mecânica quântica
(Universidade Federal de São Carlos, 2007-05-16)
The increasing interest to understand the geometric phases (mainly due to the possi-
bility to achieve geometric quantum computation robust against some kind of errors) and
the search for new techniques to solve time-dependent ...
Processos quânticos em cavidades com a geometria variável.
(Universidade Federal de São Carlos, 2004-03-11)
In this thesis, we study the quantum de ection of ultracold particles by mirrors, the shrinking of free wave packets, the tunnelling of narrow Gaussian packets through delta potentials and the entanglement between the modes ...
Monitoramento de propriedades de condensados de Bose-Einstein interagindo não ressonantemente com campos óticos via detecção contínua de fotóns
(Universidade Federal de São Carlos, 2006-03-13)
In this work we consider an of - resonant interaction between optical fields and a Bose - Einstein condensation. We used a continuous photo detection model to study the efects of the counting of k photons of the optical ...
Processos de relaxação em sistemas quânticos e álgebra de operadores não-lineares
(Universidade Federal de São Carlos, 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 ...
Estudo das técnicas de obtenção de Hamiltonianos efetivos em Óptica Quântica
(Universidade Federal de São Carlos, 2009-02-18)
In the Quantum Optics area, the construction of effective hamiltonian is a matter of great importance, since from them we can generate and manipulate quantum states and logical operations. In this work we discuss 3 approximate ...
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 Carlos, 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, ...
Dinâmica de coerência e decoerência de estados em redes de osciladores quânticos dissipativos.
(Universidade Federal de São Carlos, 2004-07-02)
In this thesis we studied the coherence and decoherence dynamics of states in
a network of dissipative quantum oscillators. The coherence dynamics refers to
the swap and recurrence process of states between the oscillators ...
Estudo dos efeitos de colisões atômicas na dinâmica, nas propriedades estatíticas e no emaranhamento entre átomos aprisionados interagindo com a luz.
(Universidade Federal de São Carlos, 2005-03-10)
In this work we consider a trapped Bose-Einstein Condensate interacting simultaneously with a high quality cavity quantized field and a classical undepleted laser field. Collisions
between atoms are taken into account by ...
Ruídos e processos quânticos fundamentais em íons aprisionados e ondas propagantes
(Universidade Federal de São Carlos, 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 ...