PHOTONIC CRYSTALS IN DIAMOND FOR QUANTUM INFORMATION PROCESSING

00:00 30-05-2006

One of the approaches to realize entanglement for quantum information processing, is cavity quantum electrodynamics. In this approach, the interaction of material qubits (atomic or electronic quantum states) with a high finesse optical resonator is used for atom-atom, atom-photon, or photon-photon entanglement. The main challenge in this approach is to avoid de-coherence induced by the cavity modes that leak to the environment. An attractive architect- ure to overcome this obstacle is formed by high-Q, coupled nano- cavities in a Photonic Crystal. The coupling of the nano-cavities can be gated to avoid de-coherence. The nitrogen-vacancy (NV) defect center in diamond, was recently shown to allow successful measurement of its spin quantum state, thus becoming a strong candidate for solid state quantum information processing. Our ini- tial findings on diamond-based, photonic crystal coupled cavity studies, and fabrication experiments are encouraging, leading to the possibility to demonstrate a gated qubit in a diamond-based photonic crystal cavity.

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