01550nas a2200145 4500008004100000245009200041210006900133260001500202300001100217490000800228520107800236100002001314700001901334856005101353 2016 eng d00aInteracting atomic interferometry for rotation sensing approaching the Heisenberg Limit0 aInteracting atomic interferometry for rotation sensing approachi c2016/11/11 a2030020 v1173 a
Atom interferometers provide exquisite measurements of the properties of non-inertial frames. While atomic interactions are typically detrimental to good sensing, efforts to harness entanglement to improve sensitivity remain tantalizing. Here we explore the role of interactions in an analogy between atomic gyroscopes and SQUIDs, motivated by recent experiments realizing ring shaped traps for ultracold atoms. We explore the one-dimensional limit of these ring systems with a moving weak barrier, such as that provided by a blue-detuned laser beam. In this limit, we employ Luttinger liquid theory and find an analogy with the superconducting phase-slip qubit, in which the topological charge associated with persistent currents can be put into superposition. In particular, we find that strongly-interacting atoms in such a system could be used for precision rotation sensing. We compare the performance of this new sensor to an equivalent non-interacting atom interferometer, and find improvements in sensitivity and bandwidth beyond the atomic shot-noise limit.
1 aRagole, Stephen1 aTaylor, J., M. uhttps://doi.org/10.1103/PhysRevLett.117.203002