DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2007 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

TT: Fachverband Tiefe Temperaturen

TT 7: Quantum Coherence and Quantum Information Systems II

TT 7.8: Talk

Monday, March 26, 2007, 15:45–16:00, H20

Spin qubits with electrically gated polyoxometalates — •Jörg Lehmann1, Alejandro Gaita-Ariño2, Eugenio Coronado2, and Daniel Loss11Departement für Physik und Astronomie, Universität Basel, Schweiz — 2Institute of Molecular Science, Universitat de Valencia, Spain

We present a scheme for the implementation of a fundamental quantum gate, the so-called square-root-of-swap operation, in electrically gated polyoxometalates. The specific molecules we consider comprise three parts: two localized spins 1/2 forming the qubits and a central core, which couples the two spins via an indirect exchange mechanism. By charging and decharging the central core the exchange interaction between the two qubits can be controlled and the square-root-of-swap gate can be realized. Based on a Bloch-Redfield description of the charging dynamics of the molecule coupled to metallic leads we calculate the gate fidelity. Using parameters obtained from an ab-initio description of the molecule, we show that fidelities of up to 99% can be achieved.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2007 > Regensburg