2025/12/22 by B. Wirtschafter, Wirtschafter, B., C. I. Westbrook +3
Physics and Astronomy · Computer Science · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Information and Cryptography #Mechanical and Optical Resonators
paper · doi:10.48550/arxiv.2512.19859
We have realized an interferometer using a thermal cloud of magnetically trapped rubidium 87 atoms on a chip. The interferometer resembles a Ramsey interferometer with a state selective spatial splitting of the two internal states as proposed in [M. Ammar, and al., Phys. Rev. A, 91, 053623]. The splitting is effected by microwave fields from two on-chip waveguides while the atoms remain magnetically trapped. The inferred maximum separation is 1.2± 0.1~μm. We observe interference fringes with a contrast around 8% limited by velocity difference of the two interferometer states when we close the interferometer. We develop a model describing this contrast decay.