Abstract
Conventional wisdom dictates that to image the position of fluorescent atoms or molecules, one should stimulate as much emission and collect as many photons as possible. That is, in this classical case, it has always been assumed that the coherence time of the system should be made short, and that the statistical scaling defines the resolution limit for imaging time . However, here we show in contrast that given the same resources, a long coherence time permits a higher resolution image. In this quantum regime, we give a procedure for determining the position of a single two-level system and demonstrate that the standard errors of our position estimates scale at the Heisenberg limit as , a quadratic, and notably optimal, improvement over the classical case.
- Received 29 September 2014
DOI:https://doi.org/10.1103/PhysRevLett.114.100801
© 2015 American Physical Society
Synopsis
Quantum Particles Spotted in Less Time
Published 11 March 2015
A proposed imaging method would image particles faster than classical approaches, provided the particles remain in a coherent quantum state.
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