2020/01/31 by Christian Ufrecht, Fabio Di Pumpo, Alexander Friedrich +6 · 33 citations
Physics and Astronomy · #Advanced Frequency and Time Standards #Astronomical interferometer #Atom interferometer #Atomic and Subatomic Physics Research #Classical mechanics #Cold Atom Physics and Bose-Einstein Condensates #Galaxy #General relativity #Gravitation #Gravitational redshift #Interferometry #Physics #Quantum mechanics #Redshift #Superluminal motion #Superposition principle #Tests of general relativity #Theoretical physics #Universality (dynamical systems) #gr-qc #physics.atom-ph #quant-ph
paper · pdf · doi:10.1103/physrevresearch.2.043240
published in Physical Review Research 2(4) (American Physical Society) · 8 pages, 4 figures
openalex publication_date 2020/11/16 · arxiv created 2020/11/17 · arxiv updated 2020/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Introducing internal-state transitions simultaneously on each branch of a light-pulse atom interferometer, we propose a scheme that is concurrently sensitive to both violations of the universality of free fall and gravitational redshift, two premises of general relativity. In contrast to redshift tests with quantum clocks, a superposition of internal states is not necessary but merely transitions between them, leading to a generalized concept of clocks in this context. The experimental realization seems feasible with already demonstrated techniques.