One-step preparation of cluster states in quantum dot molecules

Details One-step preparation of cluster states in quantum dot molecules One-step preparation of cluster states in quantum dot molecules

2006-11-24

arxiv.org/abs/quant-ph/0611247v3

Phys. Rev. A 75, 050301(R) 2007

Physics

Quantum Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevA.75.050301

Cluster states, a special type of highly entangled states, are a universal resource for measurement-based quantum computation. Here, we propose an efficient one-step generation scheme for cluster states in semiconductor quantum dot molecules, where qubits are encoded on singlet and triplet state of two coupled quantum dots. By applying a collective electrical field or simultaneously adjusting interdot bias voltages of all double-dot molecule, we get a switchable Ising-like interaction between any two adjacent quantum molecule qubits. The initialization, the single qubit measurement, and the experimental parameters are discussed, which shows the large cluster state preparation and one-way quantum computation implementable in semiconductor quantum dots with the present techniques.

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