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Paper detail

Two-Qubit Geometric Phase Gate for Quantum Dot Spins using Cavity Polariton Resonance

We describe a design to implement a two-qubit geometric phase gate, by which a pair of electrons confined in adjacent quantum dots are entangled. The entanglement is a result of the Coulomb exchange interaction between the optically excited exciton-polaritons and the localized spins. This optical coupling, resembling the electron-electron Ruderman-Kittel-Kasuya-Yosida (RKKY) inter- actions, offers high speed, high fidelity two-qubit gate operation with moderate cavity quality factor Q. The errors due to the finite lifetime of the polaritons can be minimized by optimizing the optical pulse parameters (duration and energy). The proposed design, using electrostatic quantum dots, maximizes entanglement and ensures scalability.

preprint2012arXivOpen access
Shruti PuriNa Young KimYoshihisa Yamamoto
cond-mat.mes-hallquant-ph
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Shruti PuriNa Young KimYoshihisa Yamamoto

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