Quantum electromechanics: Qubits from buckling nanobars

Details Quantum electromechanics: Qubits from buckling nanobars Quantum electromechanics: Qubits from buckling nanobars

2004-12-20

arxiv.org/abs/cond-mat/0412521v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures, 1 table

Scientific paper

We propose a mechanical qubit based on buckling nanobars--a NEMS so small as to be quantum coherent.To establish buckling nanobars as legitimate candidates for qubits, we calculate the effective buckling potential that produces the two-level system and identify the tunnel coupling between the two local states. We propose different designs of nanomechanical qubits and describe how they can be manipulated. Also we outline possible decoherence channels and detection schemes. A comparison between the well studied charge and flux superconducting qubits suggests several experimental setups which could be realized using available technology.

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