Tuesday, May 7, 2013

1305.1051 (Daniel Braun et al.)

Coherently enhanced measurements in classical mechanics    [PDF]

Daniel Braun, Sandu Popescu
We show that the recently discovered quantum-enhanced measurement protocol of coherent averaging that is capable of achieving Heisenberg-limited sensitivity without using entanglement, has a classical analogue. The classical protocol uses N harmonic oscillators coupled to a central oscillator and one measures the signal from the latter. We propose an application to the measurement of very weak interactions, and, in particular, a novel route to measuring the gravitational constant with enhanced precision.
View original: http://arxiv.org/abs/1305.1051

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