Quantum computers based on electron spins controlled by ultra-fast, off-resonant, single optical pulses
Abstract
We describe a fast quantum computer based on optically controlled electron spins in charged quantum dots that are coupled to microcavities. This scheme uses broad-band optical pulses to rotate electron spins and provide the clock signal to the system. Non-local two-qubit gates are performed by phase shifts induced by electron spins on laser pulses propagating along a shared waveguide. Numerical simulations of this scheme demonstrate high-fidelity single-qubit and two-qubit gates with operation times comparable to the inverse Zeeman frequency.
Cite
@article{arxiv.quant-ph/0610152,
title = {Quantum computers based on electron spins controlled by ultra-fast, off-resonant, single optical pulses},
author = {Susan M. Clark and Kai-Mei C. Fu and Thaddeus D. Ladd and Yoshihisa Yamamoto},
journal= {arXiv preprint arXiv:quant-ph/0610152},
year = {2009}
}
Comments
4 pages, 4 figures, introduction is clarified, the section on two-qubit gates was expanded and much more detail about gate fidelities is given, figures were modified, one figure replaced with a figure showing gate fidelities for relevant parameters