Quantum computation with coupled-quantum-dots embedded in optical microcavities
量子物理
2009-11-07 v1
摘要
Based on an idea that spatial separation of charge states can enhance quantum coherence, we propose a scheme for quantum computation with quantum bit (qubit) constructed from two coupled quantum dots. Quantum information is stored in electron-hole pair state with the electron and hole locating in different dots, which enables the qubit state being very long-lived. Universal quantum gates involving any pair of qubits are realized by coupling the quantum dots through cavity photon which is a hopeful candidate to transfer long-range information. Operation analysis is carried out by estimating the gate time versus the decoherence time.
引用
@article{arxiv.quant-ph/0203145,
title = {Quantum computation with coupled-quantum-dots embedded in optical microcavities},
author = {Xin-Qi Li and YiJing Yan},
journal= {arXiv preprint arXiv:quant-ph/0203145},
year = {2009}
}
备注
to appear in Phys. Rev. B