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arXiv · 0706.0203

Universal quantum computation in decoherence-free subspaces with hot trapped-ions

Leandro Aolita·Luiz Davidovich·Kihwan Kim·Hartmut Häffner
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Abstract

We consider interactions that generate a universal set of quantum gates on logical qubits encoded in a collective-dephasing-free subspace, and discuss their implementations with trapped ions. This allows for the removal of the by-far largest source of decoherence in current trapped-ion experiments, collective dephasing. In addition, an explicit parametrization of all two-body Hamiltonians able to generate such gates without the system's state ever exiting the protected subspace is provided.

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Leandro Aolita, Luiz Davidovich, Kihwan Kim, Hartmut Häffner. 2007-06-01. Universal quantum computation in decoherence-free subspaces with hot trapped-ions. https://doi.org/10.1103/physreva.75.052337

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