Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/146597
Title: Observable quantum entanglement due to gravity
Authors: Krisnanda, Tanjung
Tham, Guo Yao
Paternostro, Mauro
Paterek, Tomasz
Keywords: Science::Physics
Issue Date: 2020
Source: Krisnanda, T., Tham, G. Y., Paternostro, M. & Paterek, T. (2020). Observable quantum entanglement due to gravity. npj Quantum Information, 6(1), 12-. doi:10.1038/s41534-020-0243-y
Project: MOE2015-T2-2-034
Journal: npj Quantum Information
Abstract: No experiment to date has provided evidence for quantum features of the gravitational interaction. Recently proposed tests suggest looking for the generation of quantum entanglement between massive objects as a possible route towards the observation of such features. Motivated by advances in optical cooling of mirrors, here we provide a systematic study of entanglement between two masses that are coupled gravitationally. We first consider the masses trapped at all times in harmonic potentials (optomechanics) and then the masses released from the traps. This leads to the estimate of the experimental parameters required for the observation of gravitationally induced entanglement. The optomechanical setup demands LIGO-like mirrors and squeezing or long coherence times, but the released masses can be light and accumulate detectable entanglement in a timescale shorter than their coherence times. No macroscopic quantum superposition develops during the evolution. We discuss the implications from such thought experiments regarding the nature of the gravitational coupling.
URI: https://hdl.handle.net/10356/146597
ISSN: 2056-6387
DOI: 10.1038/s41534-020-0243-y
Rights: © 2020 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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