Coupling carbon nanotube mechanics to a superconducting circuit

The quantum behaviour of mechanical resonators is a new and emerging field driven by recent experiments reaching the quantum ground state. The high frequency, small mass and large quality-factor of carbon nanotube resonators make them attractive for quantum nanomechanical applications. A common elem...

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Bibliographic Details
Published in:Scientific reports 2012-09, Vol.2 (1), p.599-599, Article 599
Main Authors: Schneider, B. H., Etaki, S., van der Zant, H. S. J., Steele, G. A.
Format: Article
Language:English
Subjects:
639/766/119
639/766/119/1003
639/766/483
639/925/357/73
Carbon
Humanities and Social Sciences
Mechanical properties
multidisciplinary
Nanotechnology
Nanotubes
Photons
Science
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Summary:The quantum behaviour of mechanical resonators is a new and emerging field driven by recent experiments reaching the quantum ground state. The high frequency, small mass and large quality-factor of carbon nanotube resonators make them attractive for quantum nanomechanical applications. A common element in experiments achieving the resonator ground state is a second quantum system, such as coherent photons or a superconducting device, coupled to the resonators motion. For nanotubes, however, this is a challenge due to their small size. Here, we couple a carbon nanoelectromechanical (NEMS) device to a superconducting circuit. Suspended carbon nanotubes act as both superconducting junctions and moving elements in a Superconducting Quantum Interference Device (SQUID). We observe a strong modulation of the flux through the SQUID from displacements of the nanotube. Incorporating this SQUID into superconducting resonators and qubits should enable the detection and manipulation of nanotube mechanical quantum states at the single-phonon level.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep00599