Quantum-Enhanced Sensing Based on Time Reversal of Nonlinear Dynamics

2016/02/29 by Daniel Linnemann, Helmut Strobel, W. Muessel +7 · 3 citations
Computer Science · Physics and Astronomy · #Astronomical interferometer #Atom interferometer #Cold Atom Physics and Bose-Einstein Condensates #Interferometry #Mechanical and Optical Resonators #Nonlinear system #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Quantum network #Quantum sensor #Statistical physics #cond-mat.quant-gas #physics.atom-ph #quant-ph

paper · pdf · doi:10.1103/physrevlett.117.013001

published as Phys. Rev. Lett. 117, 013001 (2016) · 9 pages, 3 figures, 3 pages supplementary material, 2 supplementary figures

openalex publication_date 2016/06/28 · arxiv created 2016/12/13 · arxiv updated 2016/12/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

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.

Citations

• Resonant control of spin dynamics in ultracold quantum gases by microwave dressing
• All path-symmetric pure states achieve their maximal phase sensitivity in conventional two-path interferometry
• Dynamic Stabilization of a Quantum Many-Body Spin System
• Precision measurement of spin-dependent interaction strengths for spin-1 and spin-287Rb atoms
• Detecting Large Quantum Fisher Information with Finite Measurement Precision
• Spinor Bose gases: Symmetries, magnetism, and quantum dynamics
• Quantum Computing

Cited by

• Laser control of the singlet-pairing process in an ultracold spinor mixture
• Improvement of an Atomic Clock using Squeezed Vacuum
• Loss-tolerant quantum dense metrology with SU(1,1) interferometer