--- _id: '9331' abstract: - lang: eng text: 'Quantum entanglement has been generated and verified in cold-atom experiments and used to make atom-interferometric measurements below the shot-noise limit. However, current state-of-the-art cold-atom devices exploit separable (i.e., unentangled) atomic states. This perspective piece asks the question: can entanglement usefully improve cold-atom sensors, in the sense that it gives new sensing capabilities unachievable with current state-of-the-art devices? We briefly review the state-of-the-art in precision cold-atom sensing, focusing on clocks and inertial sensors, identifying the potential benefits entanglement could bring to these devices, and the challenges that need to be overcome to realize these benefits. We survey demonstrated methods of generating metrologically useful entanglement in cold-atom systems, note their relative strengths and weaknesses, and assess their prospects for near-to-medium term quantum-enhanced cold-atom sensing.' acknowledgement: We acknowledge fruitful discussions with John Close, Chris Freier, Kyle Hardman, Joseph Hope, and Paul Wigley, and insightful suggestions made by Franck Pereira dos Santos on behalf of the Atom Interferometry and Inertial Sensors team at SYRTE. S.S.S. was supported by an Australian Research Council Discovery Early Career Researcher Award (DECRA), Project No. DE200100495. O.H. was supported by IST Austria. article_number: '140501' article_processing_charge: No article_type: original author: - first_name: Stuart S. full_name: Szigeti, Stuart S. last_name: Szigeti - first_name: Onur full_name: Hosten, Onur id: 4C02D85E-F248-11E8-B48F-1D18A9856A87 last_name: Hosten orcid: 0000-0002-2031-204X - first_name: Simon A. full_name: Haine, Simon A. last_name: Haine citation: ama: 'Szigeti SS, Hosten O, Haine SA. Improving cold-atom sensors with quantum entanglement: Prospects and challenges. Applied Physics Letters. 2021;118(14). doi:10.1063/5.0050235' apa: 'Szigeti, S. S., Hosten, O., & Haine, S. A. (2021). Improving cold-atom sensors with quantum entanglement: Prospects and challenges. Applied Physics Letters. AIP Publishing. https://doi.org/10.1063/5.0050235' chicago: 'Szigeti, Stuart S., Onur Hosten, and Simon A. Haine. “Improving Cold-Atom Sensors with Quantum Entanglement: Prospects and Challenges.” Applied Physics Letters. AIP Publishing, 2021. https://doi.org/10.1063/5.0050235.' ieee: 'S. S. Szigeti, O. Hosten, and S. A. Haine, “Improving cold-atom sensors with quantum entanglement: Prospects and challenges,” Applied Physics Letters, vol. 118, no. 14. AIP Publishing, 2021.' ista: 'Szigeti SS, Hosten O, Haine SA. 2021. Improving cold-atom sensors with quantum entanglement: Prospects and challenges. Applied Physics Letters. 118(14), 140501.' mla: 'Szigeti, Stuart S., et al. “Improving Cold-Atom Sensors with Quantum Entanglement: Prospects and Challenges.” Applied Physics Letters, vol. 118, no. 14, 140501, AIP Publishing, 2021, doi:10.1063/5.0050235.' short: S.S. Szigeti, O. Hosten, S.A. Haine, Applied Physics Letters 118 (2021). date_created: 2021-04-18T22:01:40Z date_published: 2021-04-07T00:00:00Z date_updated: 2023-08-07T14:36:42Z day: '07' department: - _id: OnHo doi: 10.1063/5.0050235 external_id: arxiv: - '2010.09168' isi: - '000637702100001' intvolume: ' 118' isi: 1 issue: '14' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2010.09168 month: '04' oa: 1 oa_version: Preprint publication: Applied Physics Letters publication_identifier: issn: - '00036951' publication_status: published publisher: AIP Publishing quality_controlled: '1' scopus_import: '1' status: public title: 'Improving cold-atom sensors with quantum entanglement: Prospects and challenges' type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 118 year: '2021' ...