Berlin 2005 – scientific programme

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TT: Tiefe Temperaturen

TT 13: Transport - Quantum Coherence and Quantum Information Systems

TT 13.6: Talk

Saturday, March 5, 2005, 10:00–10:15, TU H3027

Single Electron Spin Dynamics due to Interaction with Nuclear Spins investigated with Time-dependent DMRG — •Andreas Friedrich¹, Alexander V. Khaetskii², and Ulrich Schollwöck¹ — ¹Institut für theoretische Physik C, RWTH Aachen — ²Physics Department, LMU München

We investigate the dynamics of a single electron spin due to its interaction with the underlying spin-1/2 carrying nuclei motivated by decoherence effects in spin-based quantum-bits, like a single electron in a quantum dot which became of central interest in recent years. We study the dependence of characteristic timescales on different initial states and analyze the effects of magnetic fields by means of a special type of time-dependent density-matrix renormalization-group method that allows to prepare different kinds of initial states and let them evolve in time.