Quantum-enhanced sensing based on time reversal of nonlinear dynamics

• Verfasst von: Linnemann, Daniel [VerfasserIn]
• Verfasst von: Strobel, Helmut [VerfasserIn]
• Verfasst von: Müssel, Wolfgang [VerfasserIn]
• Verfasst von: Schulz, Jessica [VerfasserIn]
• Verfasst von: Lewis-Swan, R. J. [VerfasserIn]
• Verfasst von: Kheruntsyan, K. V. [VerfasserIn]
• Verfasst von: Oberthaler, Markus K. [VerfasserIn]
• Titel: Quantum-enhanced sensing based on time reversal of nonlinear dynamics
• Verf.angabe: D. Linnemann, H. Strobel, W. Muessel, J. Schulz, R.J. Lewis-Swan, K.V. Kheruntsyan, and M.K. Oberthaler
• E-Jahr: 2016
• Jahr: 28 June 2016
• Umfang: 5 S.
• Fussnoten: Gesehen am 02.06.2020
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2016
• Band/Heft Quelle: 117(2016,1) Artikel-Nummer 013001, 5 Seiten
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.117.013001
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1699190585

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.