Berlin 2005 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
Q: Quantenoptik und Photonik
Q 34: Quanteninformation I
Q 34.5: Vortrag
Dienstag, 8. März 2005, 13:00–13:15, HU Audimax
Information transfer via molecular bridges — •Ulrike Troppmann1 and Regina de Vivie-Riedle1,2 — 1LMU München, Department Chemie, Butenandtstr. 11, 81377 München — 2MPI für Quantenoptik, Hans-Kopfermann-Str. 1, 85741 Garching
We have launched a new approach to quantum computing using vibrational qubits of polyatomic molecules and shaped fs laser pulses for logic operations [1]. A set of essential global quantum gates has been calculated, using Optimal Control Theory (OCT), and applied successfully in a fundamental quantum algorithm [2]. In the context of quantum information processing a further issue is how information can be transported between spatially separated quantum registers. An imaginable solution for a molecular quantum channel is to connect sub units of vibrational qubits with carbon chains. Different test systems were investigated where we select CC stretches as transport modes. The molecular properties, as vibrational energies and coupling elements, are derived from ab initio calculations. A first goal is to optimize population transfer through a carbon chain with specially modulated laser pulses acquired by OCT. Further issues will be coherence as well as entanglement transfer.
[1] C. M. Tesch and R. de Vivie-Riedle, PRL 89(2002) 157901.
[2] C. M. Tesch and R. de Vivie-Riedle, JCP, in press (2004).