Implementing a Quantum Algorithm with Exchange-Coupled Quantum Dots: a Feasibility study

Details Implementing a Quantum Algorithm with Exchange-Coupled Quantum Dots: a Feasibility study Implementing a Quantum Algorithm with Exchange-Coupled Quantum Dots: a Feasibility study

2003-09-04

arxiv.org/abs/quant-ph/0309051v2

Physics

Quantum Physics

24 pages, 19 figures, revised version with an expanded appendix. to be published in Quantum Information Processing

Scientific paper

We present Monte Carlo wavefunction simulations for quantum computations employing an exchange-coupled array of quantum dots. Employing a combination of experimentally and theoretically available parameters, we find that gate fidelities greater than 98 % may be obtained with current experimental and technological capabilities. Application to an encoded 3 qubit (nine physical qubits) Deutsch-Josza computation indicates that the algorithmic fidelity is more a question of the total time to implement the gates than of the physical complexity of those gates.

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