Results 61 to 70 of about 160,056 (177)

Dissipative quantum mechanics beyond Bloch-Redfield: A consistent weak-coupling expansion of the ohmic spin boson model at arbitrary bias

, 2018
We study the time dynamics of the ohmic spin boson model at arbitrary bias $\epsilon$ and small coupling $\alpha$ to the bosonic bath. Using perturbation theory and the real-time renormalization group (RG) method we present a consistent zero-temperature ...
Lindner, Carsten J., Schoeller, Herbert
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Adiabatic Approximation in the Density Matrix Approach: Non-Degenerate Systems [PDF]

, 2002
We study the adiabatic limit in the density matrix approach for a quantum system coupled to a weakly dissipative medium. The energy spectrum of the quantum model is supposed to be non-degenerate.
A.C. Aguiar Pinto, Baker, Berry, Berry, Born, Carmichael, Churchill, Dattoli, Fonseca Romero, Garrison, Harris, Hassani, Jeffreys, Joye, K.M. Fonseca Romero, Kosloff, Kvitsinsky, Louisell, M.T. Thomaz, Meystre, Moiseyev, Raffelt, Schiff, Stodolsky, Sun, Zwanziger   +25 more
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Conservation laws in the quantum Hall Liouvillian theory and its generalizations

, 2003
It is known that the localization length scaling of noninteracting electrons near the quantum Hall plateau transition can be described in a theory of the bosonic density operators, with no reference to the underlying fermions. The resulting ``Liouvillian'
Anderson, Boldyrev, Efetov, Fradkin, Girvin, Gruzberg, Gubser, Gurarie, Huckestein, Joel E. Moore, Khmelnitskii, Lee, Lee, Levine, Moore, Moore, Oppermann, Read, Sinova, Trugman, Wei   +20 more
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Dynamical spin-spin correlation functions in the Kondo model out of equilibrium

, 2009
We calculate the dynamical spin-spin correlation functions of a Kondo dot coupled to two noninteracting leads held at different chemical potentials. To this end we generalize a recently developed real-time renormalization group method in frequency space (
Schoeller, Herbert, Schuricht, Dirk
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Integrating first-order differential equations with Liouvillian solutions via quadratures: a semi-algorithmic method

Journal of Computational and Applied Mathematics, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Avellar, J., Duarte, L.G.S., Duarte, S.E.S., da Mota, L.A.C.P.   +3 more
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Time and Geometric Quantization

, 2003
In this paper we briefly review the functional version of the Koopman-von Neumann operatorial approach to classical mechanics. We then show that its quantization can be achieved by freezing to zero two Grassmannian partners of time.
A. A. ABRIKOSOV, Abraham R., D. MAURO, E. GOZZI, Woodhouse N.   +4 more
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A field-theoretic approach to the Wiener Sausage [PDF]

, 2016
The Wiener Sausage, the volume traced out by a sphere attached to a Brownian particle, is a classical problem in statistics and mathematical physics.
A Kolmogoroff, AM Berezhkovskii, AS Sznitman, AW Visser, BP Lee, D Stauffer, DC Torney, EW Montroll, F Benitez, F Spitzer, F Spitzer, FV Wijland, G Pruessner, G. Pruessner, H Hinrichsen, I Herbut, J Cardy, J Zinn-Justin, L Dagdug, L Peliti, M Berg van den, M Berg van den, M Doi, M Kac, MD Donsker, PJF Gall Le, S. Nekovar, SN Dorogovtsev, SS Manna, TC Lubensky, UC Täuber, UC Täuber, Wolfram Research Inc.   +32 more
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Crossover between ballistic and diffusive transport: The Quantum Exclusion Process

, 2011
We study the evolution of a system of free fermions in one dimension under the simultaneous effects of coherent tunneling and stochastic Markovian noise.
Breuer H P, Clark S R, Giamarchi T, Gradshteyn I S, Liggett T, Plenio M, Prosen T, Prosen T, Temme K Wolf M M Verstraete F, Viktor Eisler, Žnidarič M, Žnidarič M   +11 more
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On Koopman-von Neumann Waves

, 2001
In this paper we study the classical Hilbert space introduced by Koopman and von Neumann in their operatorial formulation of classical mechanics. In particular we show that the states of this Hilbert space do not spread, differently than what happens in ...
Mauro, D.
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Kinetic formulation of irreversible evolution of the two-nucleus spin systems

, 2010
The time irreversible evolution of the two-nucleus spin systems interacting with a magnetic field is analyzed in the framework of the subdynamics theory. The spin systems are determined by the H(1) and C(13) nuclei.
Shirmovsky, S. Eh.
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