title: Sagnac Interferometry with a Single Atomic Clock.
abstract: The Sagnac effect enables interferometric measurements of rotation with high precision. Using matter waves instead of light promises resolution enhancement by orders of magnitude that scales with particle mass. So far, the paradigm for matter wave Sagnac interferometry relies on de Broglie waves and thus on free propagation of atoms either in free fall or within waveguides. However, the Sagnac effect can be expressed as a proper time difference experienced by two observers moving in opposite directions along closed paths and has indeed been measured with atomic clocks flown around Earth. Inspired by this, we investigate an interferometer comprised of a single atomic clock. The Sagnac effect manifests as a phase shift between trapped atoms in different internal states after transportation along closed paths in opposite directions, without any free propagation. With analytic models, we quantify limitations of the scheme arising from atomic dynamics and finite temperature. Furthermore, we suggest an implementation with previously demonstrated technology.
authors.affiliation: School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
authors.forename: R
authors.initials: R
authors.lastname: Stevenson
authors.affiliation: School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.|School of Engineering and Information Technology, University of New South Wales at the Australian Defence Force Academy, Canberra 2600, Australia.
authors.forename: M R
authors.initials: MR
authors.lastname: Hush
authors.affiliation: School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
authors.forename: T
authors.initials: T
authors.lastname: Bishop
authors.affiliation: School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
authors.forename: I
authors.initials: I
authors.lastname: Lesanovsky
authors.affiliation: School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
authors.forename: T
authors.initials: T
authors.lastname: Fernholz