Spin-Orbit-Coupled Interferometry with Ring-Trapped Bose-Einstein Condensates

Helm, J. L.; Billam, T. P.; Rakonjac, A.; Cornish, S. L.; Gardiner, S. A.

Abstract

We propose a method of atom interferometry using a spinor Bose-Einstein condensate with a timevarying magnetic field acting as a coherent beam splitter. Our protocol creates long-lived superpositional counterflow states, which are of fundamental interest and can be made sensitive to both the Sagnac effect and magnetic fields on the sub-μG scale. We split a ring-trapped condensate, initially in the mf ¼ 0 hyperfine state, into superpositions of internal mf ¼ 1 states and condensate superflow, which are spinorbit coupled. After interrogation, the relative phase accumulation can be inferred from a population transfer to the mf ¼ 1 states. The counterflow generation protocol is adiabatically deterministic and does not rely on coupling to additional optical fields or mechanical stirring techniques. Our protocol can maximize the classical Fisher information for any rotation, magnetic field, or interrogation time and so has the maximum sensitivity available to uncorrelated particles. Precision can increase with the interrogation time and so is limited only by the lifetime of the condensate.

Citation

Helm, J., Billam, T., Rakonjac, A., Cornish, S., & Gardiner, S. (2018). Spin-Orbit-Coupled Interferometry with Ring-Trapped Bose-Einstein Condensates. Physical Review Letters, 120(6), Article 063201. https://doi.org/10.1103/physrevlett.120.063201

• Journal Article Type: Article
• Acceptance Date: Jan 10, 2018
• Online Publication Date: Feb 6, 2018
• Publication Date: Feb 9, 2018
• Deposit Date: Feb 22, 2018
• Publicly Available Date: Feb 22, 2018
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 120
• Issue: 6
• Article Number: 063201
• DOI: https://doi.org/10.1103/physrevlett.120.063201
• Public URL: https://durham-repository.worktribe.com/output/1338553