Tomography of a Number-Resolving Detector by Reconstruction of an Atomic Many-Body Quantum State

authored by: Mareike Hetzel, Luca Pezzè, Cebrail Pür, Martin Quensen, Andreas Hüper, Jiao Geng, Jens Kruse, Luis Santos, Wolfgang Ertmer, Augusto Smerzi, Carsten Klempt
Abstract: The high-fidelity analysis of many-body quantum states of indistinguishable atoms requires the accurate counting of atoms. Here we report the tomographic reconstruction of an atom-number-resolving detector. The tomography is performed with an ultracold rubidium ensemble that is prepared in a coherent spin state by driving a Rabi coupling between the two hyperfine clock levels. The coupling is followed by counting the occupation number in one level. We characterize the fidelity of our detector and show that a negative-valued Wigner function is associated with it. Our results offer an exciting perspective for the high-fidelity reconstruction of entangled states and can be applied for a future demonstration of Heisenberg-limited atom interferometry.
Organisation(s): Institute of Quantum Optics
Institute of Theoretical Physics
QuantumFrontiers
CRC 1227 Designed Quantum States of Matter (DQ-mat)
External Organisation(s): University of Florence (UniFi)
Westlake University
Type: Article
Journal: Physical review letters
Volume: 131
No. of pages: 7
ISSN: 0031-9007
Publication date: 26.12.2023
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Physics and Astronomy(all)
Electronic version(s): https://doi.org/10.48550/arXiv.2207.01270 (Access: Open)
https://doi.org/10.1103/PhysRevLett.131.260601 (Access: Closed)

BibTeX

@article{727cded88e5d4a4baf0721137ce10f4b,
title = "Tomography of a Number-Resolving Detector by Reconstruction of an Atomic Many-Body Quantum State",
abstract = "The high-fidelity analysis of many-body quantum states of indistinguishable atoms requires the accurate counting of atoms. Here we report the tomographic reconstruction of an atom-number-resolving detector. The tomography is performed with an ultracold rubidium ensemble that is prepared in a coherent spin state by driving a Rabi coupling between the two hyperfine clock levels. The coupling is followed by counting the occupation number in one level. We characterize the fidelity of our detector and show that a negative-valued Wigner function is associated with it. Our results offer an exciting perspective for the high-fidelity reconstruction of entangled states and can be applied for a future demonstration of Heisenberg-limited atom interferometry.",
author = "Mareike Hetzel and Luca Pezz{\`e} and Cebrail P{\"u}r and Martin Quensen and Andreas H{\"u}per and Jiao Geng and Jens Kruse and Luis Santos and Wolfgang Ertmer and Augusto Smerzi and Carsten Klempt",
note = "Funding Information: This work is supported by the QuantERA grants SQUEIS and MENTA. We acknowledge financial support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), Project ID 274200144-SFB 1227 DQ-mat within the project B01 and Germany{\textquoteright}s Excellence Strategy, EXC-2123 QuantumFrontiers, Project-ID 390837967. M. Q. acknowledges support from the Hannover School for Nanotechnology (HSN). ",
year = "2023",
month = dec,
day = "26",
doi = "10.48550/arXiv.2207.01270",
language = "English",
volume = "131",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "26",
}