Düsseldorf 2007 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 61: Quantum Control I

MO 61.7: Vortrag

Freitag, 23. März 2007, 12:00–12:15, 6F

Quantum Information Transfer through Molecular Chains — •Caroline Gollub, Ulrike Troppmann, and Regina de Vivie-Riedle — LMU Department Chemie, Butenandt-Str. 11, 81377 München, Germany

Molecular bridge systems consisting of (C≡C−)_n units, such as octatetrayne, offer an innovative possibility to construct quantum networks, within our approach of molecular quantum computing [1].

The vibrational qubits are encoded in selected normal modes of molecular subunits. These multiple nodes are connected by molecular chains to larger quantum registers. Ultrashort, shaped laser pulses, act as quantum gates on the multi-qubit systems. Independent control of the nodes is possible. The bridging molecules represent the units, essential for quantum information transfer. The communication between the qubit systems is realized by specially shaped, ultrashort laser pulses, calculated with Optimal Control Theory. In this context we present shaped pulses inducing selective quantum state transfer through different quantum channels of the bridging molecules. Additionally, the generation of inter-node superpositions has to be required for quantum multicomputers and we demonstrate the implemenation of entanglement generation in our approach of scalable molecular quantum computing with vibrational qubits.

[1] C. M. Tesch, R. de Vivie-Riedle, Phys. Rev. Lett., 89, (2002).