Nuclear spin qubits in a trapped-ion quantum computer

Details Nuclear spin qubits in a trapped-ion quantum computer Nuclear spin qubits in a trapped-ion quantum computer

2009-04-26

arxiv.org/abs/0904.4020v1

Phys. Rev. A 79, 052331 (2009)

Physics

Quantum Physics

7 pages

Scientific paper

Physical systems must fulfill a number of conditions to qualify as useful quantum bits (qubits) for quantum information processing, including ease of manipulation, long decoherence times, and high fidelity readout operations. Since these conditions are hard to satisfy with a single system, it may be necessary to combine different degrees of freedom. Here we discuss a possible system, based on electronic and nuclear spin degrees of freedom in trapped ions. The nuclear spin yields long decoherence times, while the electronic spin, in a magnetic field gradient, provides efficient manipulation, and the optical transitions of the ions assure a selective and efficient initialization and readout.

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