Quantum-Enhanced Sensing Based on Time Reversal of Nonlinear Dynamics
Abstract
We experimentally demonstrate a nonlinear detection scheme exploiting time-reversal dynamics that disentangles continuous variable entangled states for feasible readout. Spin-exchange dynamics of Bose-Einstein condensates is used as the nonlinear mechanism which not only generates entangled states but can also be time reversed by controlled phase imprinting. For demonstration of a quantum-enhanced measurement we construct an active atom SU(1,1) interferometer, where entangled state preparation and nonlinear readout both consist of parametric amplification. This scheme is capable of exhausting the quantum resource by detecting solely mean atom numbers. Controlled nonlinear transformations widen the spectrum of useful entangled states for applied quantum technologies.
Cite
@article{arxiv.1602.07505,
title = {Quantum-Enhanced Sensing Based on Time Reversal of Nonlinear Dynamics},
author = {Daniel Linnemann and Helmut Strobel and Wolfgang Muessel and Jonas Schulz and Robert J. Lewis-Swan and Karen V. Kheruntsyan and Markus K. Oberthaler},
journal= {arXiv preprint arXiv:1602.07505},
year = {2016}
}
Comments
9 pages, 3 figures, 3 pages supplementary material, 2 supplementary figures