Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session Y03: Precision Measurements Using Objects and of Gravity
10:30 AM–12:30 PM,
Friday, June 7, 2024
Room: 201A
Chair: Derek Kimball, California State University - East Bay
Abstract: Y03.00006 : Entanglement generation between atoms and mechanical resonators: from magnetic to gravitational interactions*
11:30 AM–11:42 AM
Presenter:
Gayathrini Premawardhana
(University of Maryland, College Park)
Authors:
Gayathrini Premawardhana
(University of Maryland, College Park)
Prabudhya Bhattacharyya
(University of California, Berkeley)
Cristian D Panda
(University of California, Berkeley)
Matthew J Tao
(University of California, Berkeley)
Garrett Louie
(University of California, Berkeley)
Lorenz Keck
(National Institute of Standards and Technology, Gaithersburg)
Jacob M Taylor
(University of Maryland (College Park) and National Institute of Standards and Technology (Gaithersburg))
A tremendous amount of recent effort has focused on developing hybrid systems of quantum sensors coupled to a dynamical macroscopic mass. These systems can serve as a versatile testbed for measuring the low energy quantum mechanical behavior of macroscopic masses and investigating the integration of quantum mechanics with gravity. This work builds on a recent experimental proposal for entangling a trapped atom interferometer with a test mass to elucidate the behaviors of certain quantum theories of gravity [https://doi.org/10.1103/PRXQuantum.2.030330].
Using an atom interferometer where atoms are held in an optical lattice can allow for minute scale interactions with the test mass [https://arxiv.org/abs/2301.13315]. Additionally, a diamagnetic test mass enables tuning the nature of the coupling. I will discuss our efforts to optimize the performance of entangling protocols that use such a magnetic interaction as a complement to the gravitational interaction, and whether such entanglement may be accessible in future experiments. Critically, our approach relies upon leveraging the atoms in the different interferometric paths to create non-classical states of a mechanical system. We aim to use a low-frequency oscillator with an unprecedented mechanical quality factor. This may lead to mechanical-atom entangled states which may be particularly sensitive to effects like gravitational decoherence.
*This work is funded by the Heising-Simons Foundation.
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