{"id":"https://openalex.org/keywords/two-level-atom","display_name":"two-level atom","description":"An idealized quantum system with two energy states, used in atomic physics to study interactions with electromagnetic fields and light.","display_name_alternatives":["two-level atomic system","two-state atomic system","two level atom model","two-level atoms","two-state atom"],"ids":{"openalex":"https://openalex.org/keywords/two-level-atom","wikidata":null},"primary_topic":{"id":"https://openalex.org/T11414","display_name":"Quantum optics and atomic interactions","score":0.5652,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11414","display_name":"Quantum optics and atomic interactions","score":0.5652,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10020","display_name":"Quantum Information and Cryptography","score":0.1176,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"works_count":7763,"cited_by_count":135422,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/two-level-atom","updated_date":"2026-10-23T04:06:34","created_date":"2026-09-30T00:00:00"}
