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Published 2001 | public
Book Section - Chapter

Quantum measurement with nanomechanical systems


The technology exists for preparing and measuring nanoscale mechanical systems at the quantum limit. A nanomechanical system has recently demonstrated the fundamental limit for heat flow through discrete channels. This universal energy transport limit is intimately related to the predicted maximum information rate per channel. I will discuss this measurement and experiments that are under preparation at LPS, using nanomechanical resonators with rf-SET read-out to achieve positive detection limited by the uncertainty principle: the standard quantum limit. This system offers the possibility of implementing advanced measurement strategies, such as quantum non-demolition techniques, to beat this limit. In addition to revealing the fascinating collective quantum behavior of 10^(10) atoms, developing ultra0sensitive position sensors may be important for quantum computing applications such as single electron spin read-out with cantilevers, and provide an understanding of the interaction between delicate quantum systems and real read-out devices.

Additional Information

© 2001 Rinton Press. I would like to acknowledge many helpful conversations with M.L. Roukes and his group at Caltech, P.C. Hammel, M. Manheimer, B.E. Kane, M. Lahaye, M.P. Blencow, and M.N. Wybourne. This work is supported by the National Security Agency (NSA) and the Advanced Research and Development Activity.

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August 19, 2023
October 18, 2023