Qubits from tight knots and bent nano-bars

Details Qubits from tight knots and bent nano-bars Qubits from tight knots and bent nano-bars

2008-03-21

arxiv.org/abs/0803.3139v1

Physics

Quantum Physics

Scientific paper

We propose a novel mechanism for creating a qubit based on a tight knot, that is a nano-quantum wire system so small and so cold as to be quantum coherent with respect to curvature-induced effects. To establish tight knots as legitimate candidates for qubits, we propose an effective curvature-induced potential that produces the two-level system and identify the tunnel coupling between the two local states. We propose also a different design of nano-mechanical qubit based on twisted nano-rods. We describe how both devices can be manipulated. Also we outline possible decoherence channels, detection schemes and experimental setups.

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