Schemes for robust quantum computation with polar molecules: analysis of experimental feasibility

Details Schemes for robust quantum computation with polar molecules: analysis of experimental feasibility Schemes for robust quantum computation with polar molecules: analysis of experimental feasibility

2007-10-23

arxiv.org/abs/0710.4356v1

Physics

Quantum Physics

Scientific paper

We analyse recently proposed physical implementations of a quantum computer based on polar molecules. A set of general requirements for a molecular system is presented, which would provide an optimal combination of quantum gate times, coherence times, number of operations, high gate accuracy and experimental feasibility. We proceed with a detailed analysis of a scheme utilizing switchable dipole-dipole interactions between polar molecules. Switchable dipole-dipole interaction is an efficient tool for realization of two-qubit quantum gates, necessary to construct a universal set of gates. We consider three possible realizations of a phase gate using specific molecules, such as CO, NF, alkali dimers and alkaline-earth monohalides. We suggest suitable electronic states and ransitions and investigate requirements for the pulses driving them. Finally, we analyse possible sources of decoherence.

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