Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Tomography of a number-resolving detector by reconstruction of an atomic many-body quantum state

Jul 21, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Degenerate gases, many-body physics, and quantum simulation Poster session

Description

A tomography of many-body quantum states of indistinguishable particles is generally performed by global couplings between the involved states and a subsequent counting of the occupation numbers. While precise couplings belong to the standard toolbox, an accurate number counting presents a considerable challenge for both photonic and atomic quantum states. Here we present an application of a number-resolving atom counting for the state reconstruction of an atomic coherent spin state. We generate a coherent spin state by driving a Rabi coupling between the two hyperfine clock states of an ultracold rubidium ensemble. The result is analyzed by a number-resolving fluorescence detection setup. We characterize the fidelity of our detector and show that a negative-valued Wigner function is associated with it. The results offer an exciting perspective for the high-fidelity tomography of entangled states and can be applied for the future demonstration of Heisenberg-limited atom interferometry.

Presenter name Mareike Hetzel
How will you attend ICAP-27? I am planning on in-person attendance

Primary authors

Mareike Hetzel (Institut für Quantenoptik, Leibniz Universität Hannover, Germany) Luca Pezzè (QSTAR and INO-CNR and LENS, Firenze, Italy) Cebrail Pür (Institut für Quantenoptik, Leibniz Universität Hannover, Germany) Martin Quensen (Institut für Quantenoptik, Leibniz Universität Hannover, Germany) Andreas Hüper (Institut für Quantenoptik, Leibniz Universität Hannover, Germany) Jiao Geng (Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering and Institute of Advanced Technology, Westlake Institute for Advanced Study, Zhejiang Province, China) Jens Kruse (Deutsches Zentrum für Luft- und Raumfahrt e.V., Institut für Satellitengeodäsie und Inertialsensorik (DLR-SI), Germany) Luis Santos (Institut für Theoretische Physik, Leibniz Universität Hannover, Germany) Wolfgang Ertmer (Deutsches Zentrum für Luft- und Raumfahrt e.V., Institut für Satellitengeodäsie und Inertialsensorik (DLR-SI), Germany) Augusto Smerzi (QSTAR and INO-CNR and LENS, Firenze, Italy) Carsten Klempt (Institut für Quantenoptik, Leibniz Universität Hannover, Germany)

Presentation materials

There are no materials yet.