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Amir Ordacgi Caldeira
Researcher at State University of Campinas
Publications - 100
Citations - 8704
Amir Ordacgi Caldeira is an academic researcher from State University of Campinas. The author has contributed to research in topics: Dissipative system & Quantum decoherence. The author has an hindex of 22, co-authored 98 publications receiving 8084 citations. Previous affiliations of Amir Ordacgi Caldeira include University of Illinois at Urbana–Champaign & IBM.
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Quantum tunnelling in a dissipative system
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Path integral approach to quantum Brownian motion
TL;DR: In this paper, the authors apply the influence-functional method of Feynman and Vernon to the study of Brownian motion at arbitrary temperature and obtain an explicit expression for the time evolution of the complete density matrix ϱ(x, x, x′, t) when the system starts in a particular kind of pure state.
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Influence of Dissipation on Quantum Tunneling in Macroscopic Systems
TL;DR: In this article, a quantum system which can tunnel out of a metastable state and whose interaction with its environment is adequately described in the classically accessible region by a phenomenological friction coefficient was considered.
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Non-Markovian dynamics of quantum discord
TL;DR: In this article, the quantum discord dynamics of two qubits in independent and common non-Markovian environments were evaluated and compared with the dynamics of entanglement and quantum discord.
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Influence of damping on quantum interference: An exactly soluble model
TL;DR: The influence-functional method is used and it is shown that quantum-interference effects are severely diminished by the presence of damping even when its influence on the system is only light.