112 citations · 184 across the 6 of their papers we have counts for
6 papers
Dynamics of a large spin with weak dissipation
T. Vorrath, T. Brandes, B. Kramer
We investigate the generalization of the spin-boson model to arbitrary spin size. The Born-Markov approximation is employed to derive a master equation in the regime of small coupl…
Dicke Effect in the Tunnel Current through two Double Quantum Dots
T. Vorrath, T. Brandes
We calculate the stationary current through two double quantum dots which are interacting via a common phonon environment. Numerical and analytical solutions of a master equation i…
Phonon Cavity Models for Quantum Dot Based Qubits
T. Vorrath, S. Debald, B. Kramer +1
Phonon cavities are believed to be the next step towards a control of dephasing in semiconductor quantum dot `qubits'. In this paper, we discuss two models for phonon cavities - a…
Adiabatic Transfer of Electrons in Coupled Quantum Dots
T. Brandes, T. Vorrath
We investigate the influence of dissipation on one- and two-qubit rotations in coupled semiconductor quantum dots, using a (pseudo) spin-boson model with adiabatically varying para…
Dissipation in Open Two-Level Systems: Perturbation Theory and Polaron Transformation
T. Brandes, T. Vorrath
We compare standard perturbation theory with the polaron transformation for non-linear transport of electrons through a two-level system. For weak electron-phonon coupling and larg…
Phonons and Phonon Confinement in Transport through Double Quantum Dots
S. Debald, T. Vorrath, T. Brandes +1
We calculate the electron-phonon interaction coefficients for surface acoustic waves and for phonons in free standing quantum wells. These are used to derive the inelastic current…