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Anthony J. Leggett
Researcher at University of Illinois at Urbana–Champaign
Publications - 215
Citations - 25834
Anthony J. Leggett is an academic researcher from University of Illinois at Urbana–Champaign. The author has contributed to research in topics: Superfluidity & Superconductivity. The author has an hindex of 52, co-authored 211 publications receiving 24134 citations. Previous affiliations of Anthony J. Leggett include University of Waterloo & University of Minnesota.
Papers
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Dynamics of the dissipative two-state system
Anthony J. Leggett,Sudip Chakravarty,Alan T. Dorsey,Matthew P. A. Fisher,Anupam Garg,Wilhelm Zwerger +5 more
TL;DR: In this article, a functional-integral approach to the dynamics of a two-state system coupled to a dissipative environment is presented, and an exact and general prescription for the reduction, under appropriate circumstances, of the problem of a system tunneling between two wells in the presence of dissipative environments to the spin-boson problem is given.
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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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Bose-Einstein condensation in the alkali gases: Some fundamental concepts
TL;DR: In this paper, the authors present a tutorial review of some ideas that are basic to our current understanding of Bose-Einstein condensation in the dilute atomic alkali gases, with special emphasis on the case of two or more coexisting hyperfine species.
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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.