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Quantum Simulation
Scaling approach for the time-dependent Kondo model
arXiv
Authors: C. Tomaras, S. Kehrein
Year
2010
Paper ID
10559
Status
Preprint
Abstract Read
~2 min
Abstract Words
76
Citations
N/A
Abstract
We present a new nonperturbative method to deal with the time-dependent quantum many-body problem, which is an extension of Wegner's flow equations to time-dependent Hamiltonians. The formalism provides a scaling procedure for the set of time-dependent interaction constants. We apply these ideas to a Kondo model with a ferromagnetic exchange coupling switched on over a time scale τ. We show that the asymptotic expectation value of the impurity spin interpolates continuously between its quenched and adiabatic value.
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- This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
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- We present a new nonperturbative method to deal with the time-dependent quantum many-body problem, which is an extension of Wegner's flow equations to time-dependent Hamiltonians.
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