Controlling the dynamical scale factor in a trapped atom Sagnac interferometer

Zhou, Yijia; Lesanovsky, Igor; Fernholz, Thomas; Li, Weibin

Abstract

Sagnac interferometers with massive particles promise unique advantages in achieving high-precision measurements of rotation rates over their optical counterparts. Recent proposals and experiments are exploring nonballistic Sagnac interferometers where trapped atoms are transported along a closed path. This is achieved by using superpositions of internal quantum states and their control with state-dependent potentials. We address emergent questions regarding the dynamical behavior of Bose-Einstein condensates in such an interferometer and its impact on rotation sensitivity. We investigate complex dependencies on atomic interactions as well as trap geometries, rotation rates, and speed of operation. We find that temporal transport profiles obtained from a simple optimization strategy for noninteracting particles remain surprisingly robust also in the presence of interactions over a large range of realistic parameters. High sensitivities can be achieved for short interrogation times far from the adiabatic regime. This highlights a route to building fast and robust guided-ring Sagnac interferometers with fully trapped atoms.

• Journal Article Type: Article
• Acceptance Date: Jan 9, 2020
• Online Publication Date: Jan 29, 2020
• Publication Date: Jan 29, 2020
• Deposit Date: Mar 11, 2020
• Publicly Available Date: Sep 16, 2020
• Journal: Physical Review A
• Print ISSN: 2469-9926
• Electronic ISSN: 2469-9934
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 101
• Issue: 1
• Article Number: 012517
• DOI: https://doi.org/10.1103/physreva.101.012517
• Public URL: https://nottingham-repository.worktribe.com/output/3842169
• Publisher URL: https://journals.aps.org/pra/ahttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.101.012517bstract/10.1103/PhysRevA.101.012517
• Additional Information: ©2020 American Physical Society