Quantum limits on detection sensitivity of a linear detector with feedback

Abstract

We show that the detection sensitivity of a linear detector is lower bounded by some quantum limits. For the force detection, relevant for atomic force microscopes, the lower bound is given by the so-called ultimate quantum limit. For the displacement detection, relevant for detecting gravitational waves, a generalized lower bound is obtained.

5 pages, 4 figures

References in corpus (3)

• Beating quantum limits in optomechanical sensor by cavity detuning
• Coherent versus measurement feedback: Linear systems theory for quantum information
• Coherent Cancellation of Backaction Noise in optomechanical Force Measurements