Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-01-02
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
6 pages, 3 figures, 1 table
Scientific paper
10.1103/PhysRevB.75.165417
Analyzing recent experimental results, we find similar behaviors and a deep analogy between three-junction superconducting qubits and suspended carbon nanotubes. When these different systems are ac-driven near their resonances, the resonance single-peak, observed at weak driving, splits into two sub-peaks (Fig. 1) when the driving increases. This unusual behavior can be explained by considering quantum tunneling in a double well potential for both systems. Inspired by these experiments, 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 nanobars and well studied superconducting qubits suggests several future experiments on quantum electromechanics.
Hu Xuedong
Kasumov Alik
Nori Franco
Savel'ev Sergey
No associations
LandOfFree
Quantum electromechanics: Quantum tunneling near resonance and qubits from buckling nanobars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum electromechanics: Quantum tunneling near resonance and qubits from buckling nanobars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum electromechanics: Quantum tunneling near resonance and qubits from buckling nanobars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-41678