Quantum computers based on electron spins controlled by ultra-fast, off-resonant, single optical pulses

Details Quantum computers based on electron spins controlled by ultra-fast, off-resonant, single optical pulses Quantum computers based on electron spins controlled by ultra-fast, off-resonant, single optical pulses

2006-10-18

arxiv.org/abs/quant-ph/0610152v3

Physics

Quantum Physics

4 pages, 4 figures, introduction is clarified, the section on two-qubit gates was expanded and much more detail about gate fid

Scientific paper

10.1103/PhysRevLett.99.040501

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.

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