Quantum measurement with nanomechanical systems

Abstract

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.

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