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Consortium of Swiss Academic Libraries

Decoupling with Random Quantum Circuits

Brown, Winton ; Fawzi, Omar

In: Communications in Mathematical Physics, 2015, vol. 340, no. 3, p. 867-900

Consortium of Swiss Academic Libraries

An introduction to the problem of bridging quantum and classical dynamics

Bonella, S. ; Ciccotti, G.

In: The European Physical Journal Special Topics, 2015, vol. 224, no. 12, p. 2305-2320

Consortium of Swiss Academic Libraries

Exponential Decay of Correlations Implies Area Law

Brandão, Fernando ; Horodecki, Michał

In: Communications in Mathematical Physics, 2015, vol. 333, no. 2, p. 761-798

Consortium of Swiss Academic Libraries

Quantum Conditional Mutual Information and Approximate Markov Chains

Fawzi, Omar ; Renner, Renato

In: Communications in Mathematical Physics, 2015, vol. 340, no. 2, p. 575-611

Université de Fribourg

NESSi : The Non-Equilibrium Systems Simulation package

Schüler, Michael ; Golež, Denis ; Murakami, Yuta ; Bittner, Nikolaj ; Herrmann, Andreas ; U.R.Strand, Hugo ; Werner, Philipp ; Eckstein, Martin

In: Computer Physics Communications, 2020, vol. 257, no. 2020, p. 107484

The nonequilibrium dynamics of correlated many-particle systems is of interest in connection with pump–probe experiments on molecular systems and solids, as well as theoretical investigations of transport properties and relaxation processes. Nonequilibrium Green’s functions are a powerful tool to study interaction effects in quantum many-particle systems out of equilibrium, and to extract...

Université de Fribourg

Correlations in multithermostat Brownian systems with Lorentz force

Abdoli, Iman ; Kalz, Erik ; Vuijk, Hidde D. ; Wittmann, René ; Sommer, Jens-Uwe ; Brader, Joseph M. ; Sharma, Abhinav

In: New Journal of Physics, 2020, vol. 22, no. 9, p. 093057

We study the motion of a Brownian particle subjected to Lorentz force due to an external magnetic field. Each spatial degree of freedom of the particle is coupled to a different thermostat. We show that the magnetic field results in correlation between different velocity components in the stationary state. Integrating the velocity autocorrelation matrix, we obtain the diffusion matrix that...

Université de Fribourg

Nondiffusive fluxes in a Brownian system with Lorentz force

Abdoli, I. ; Vuijk, H. D. ; Sommer, J. U. ; Brader, Joseph M. ; Sharma, Abhinav

In: Physical Review E, 2020, vol. 101, no. 1, p. 012120

The Fokker-Planck equation provides a complete statistical description of a particle undergoing random motion in a solvent. In the presence of Lorentz force due to an external magnetic field, the Fokker-Planck equation picks up a tensorial coefficient, which reflects the anisotropy of the particle's motion. This tensor, however, cannot be interpreted as a diffusion tensor; there are...

Université de Fribourg

Escape rate of transiently active Brownian particle in one dimension

Scacchi, Alberto ; Brader, Joseph M. ; Sharma, Abhinav

In: Physical Review E, 2019, vol. 100, no. 1, p. 012601

Activity significantly enhances the escape rate of a Brownian particle over a potential barrier. Whereas constant activity has been extensively studied in the past, little is known about the effect of time-dependent activity on the escape rate of the particle. In this paper, we study the escape problem for a Brownian particle that is transiently active; the activity decreases rapidly during...