Darmstadt 2008 – scientific programme

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MO: Fachverband Molekülphysik

MO 7: Quantenkontrolle

MO 7.6: Talk

Tuesday, March 11, 2008, 15:15–15:30, 3F

Molecular Vibrational Quantum Computing Based on Stimulated Raman Gates — •Caroline Gollub, Markus Kowalewski und Regina de Vivie-Riedle — Department Chemie, LMU München

The concept of molecular vibrational quantum computing [1], is based on vibrational eigenstates encoding the qubits. In a new approach we use stimulated non-resonant Raman processes acting as quantum gates. The advantages of this idea in comparison to IR quantum gates are a higher flexibility in a choice of laser wavelengths in combination with established shaping techniques in the visible and near IR domain. Additionally, chirped pulses might be used as quantum gates. The logic operations can be optimized by a modified Krotov OCT scheme including restrictions on the laser fields in the frequency domain to assure simple pulse spectra. Stimulated Raman gates are presented for a 2D qubit system which is described fully quantum chemically. Additionally, the effects using polarized laser fields are discussed.
[1] C. Tesch, R. de Vivie-Riedle, Phys. Rev. Lett. 89, 157901 (2002).