Macroscopic quantum effects in nanomechanical systems

Details Macroscopic quantum effects in nanomechanical systems Macroscopic quantum effects in nanomechanical systems

2003-08-11

arxiv.org/abs/cond-mat/0308205v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 3 figures, uses epl.cls, submitted to Europhysics Letters, revised version

Scientific paper

10.1209/epl/i2003-10064-8

We investigate quantum effects in the mechanical properties of elastic beams on the nanoscale. Transverse quantum and thermal fluctuations and the nonlinear excitation energies are calculated for beams compressed in longitudinal direction. Near the Euler instability, the system is described by a one dimensional Ginzburg-Landau model where the order parameter is the amplitude of the buckling mode. We show that in single wall carbon nanotubes with lengths of order or smaller than 100 nm zero point fluctuations are accessible and discuss the possibility of observing macroscopic quantum coherence in nanobeams near the critical strain.

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