Improved bounds on Lorentz violation from composite pulse Ramsey spectroscopy in a trapped ion

authored by

Laura S. Dreissen, Chih-Han Yeh, Henning A. Fuerst, Kai C. Grensemann, Tanja Mehlstäubler

Abstract

In attempts to unify the four known fundamental forces in a single quantum-consistent theory, it is suggested that Lorentz symmetry may be broken at the Planck scale. Here we search for Lorentz violation at the low-energy limit by comparing orthogonally oriented atomic orbitals in a Michelson-Morley-type experiment. We apply a robust radiofrequency composite pulse sequence in the

²F

_7/2 manifold of an Yb

⁺ ion, extending the coherence time from 200 μs to more than 1 s. In this manner, we fully exploit the high intrinsic susceptibility of the

²F

_7/2 state and take advantage of its exceptionally long lifetime. We match the stability of the previous best Lorentz symmetry test nearly an order of magnitude faster and improve the constraints on the symmetry breaking coefficients to the 10

⁻²¹ level. These results represent the most stringent test of this type of Lorentz violation. The demonstrated method can be further extended to ion Coulomb crystals.

Organisation(s)

Institute of Quantum Optics
CRC 1227 Designed Quantum States of Matter (DQ-mat)

External Organisation(s)

National Metrology Institute of Germany (PTB)

Type

Article

Journal

Nature Communications

Volume

ISSN

2041-1723

Publication date

27.11.2022

Publication status

Published

Peer reviewed

Yes

Electronic version(s)

https://doi.org/10.1038/s41467-022-34818-0 (Access: Open)

BibTeX

@article{c3f00258312240ec8b565bf8064ccaea,
title = "Improved bounds on Lorentz violation from composite pulse Ramsey spectroscopy in a trapped ion",
abstract = "In attempts to unify the four known fundamental forces in a single quantum-consistent theory, it is suggested that Lorentz symmetry may be broken at the Planck scale. Here we search for Lorentz violation at the low-energy limit by comparing orthogonally oriented atomic orbitals in a Michelson-Morley-type experiment. We apply a robust radiofrequency composite pulse sequence in the 2F 7/2 manifold of an Yb + ion, extending the coherence time from 200 μs to more than 1 s. In this manner, we fully exploit the high intrinsic susceptibility of the 2F 7/2 state and take advantage of its exceptionally long lifetime. We match the stability of the previous best Lorentz symmetry test nearly an order of magnitude faster and improve the constraints on the symmetry breaking coefficients to the 10 −21 level. These results represent the most stringent test of this type of Lorentz violation. The demonstrated method can be further extended to ion Coulomb crystals.",
author = "Dreissen, {Laura S.} and Chih-Han Yeh and Fuerst, {Henning A.} and Grensemann, {Kai C.} and Tanja Mehlst{\"a}ubler",
note = "Funding Information: We thank Melina Filzinger, Richard Lange, Burkhard Lipphardt, Nils Huntemann and Andr{\'e} Kulosa for experimental support. We thank Ralf Lehnert, Arnaldo Vargas, Nils Huntemann and Ekkehard Peik for helpful discussions and Ravid Shaniv for motivating this work. We thank Ralf Lehnert for carefully reading the manuscript. L.S.D. acknowledges support from the Alexander von Humboldt foundation. This project has been funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy - EXC-2123 QuantumFrontiers -390837967 (RU B06) and through Grant No. CRC 1227 (DQ-mat, project B03). This work has been supported by the Max-Planck-RIKEN-PTB-Center for Time, Constants and Fundamental Symmetries.",
year = "2022",
month = nov,
day = "27",
doi = "10.1038/s41467-022-34818-0",
language = "English",
volume = "13",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}