Quantum-limited metrology and Bose-Einstein condensates
Quantum Physics
2010-11-02 v3
Abstract
We discuss a quantum-metrology protocol designed to estimate a physical parameter in a Bose-Einstein condensate of N atoms, and we show that the measurement uncertainty can decrease faster than 1/N. The 1/N scaling is usually thought to be the best possible in any measurement scheme. From the perspective of quantum information theory, we outline the main idea that leads to a measurement uncertainty that scales better than 1/N. We examine in detail some potential problems and challenges that arise in implementing such a measurement protocol using a Bose-Einstein condensate. We discuss how some of these issues can be dealt with by using lower-dimensional condensates trapped in nonharmonic potentials.
Cite
@article{arxiv.0906.0962,
title = {Quantum-limited metrology and Bose-Einstein condensates},
author = {Sergio Boixo and Animesh Datta and Matthew J. Davis and Anil Shaji and Alexandre B. Tacla and Carlton M. Caves},
journal= {arXiv preprint arXiv:0906.0962},
year = {2010}
}
Comments
32 pages, 1 figure, updated references