title: Simultaneous Precision Gravimetry and Magnetic Gradiometry with a Bose-Einstein Condensate: A High Precision, Quantum Sensor.
abstract: A Bose-Einstein condensate is used as an atomic source for a high precision sensor. A 5×10^{6}  atom F=1 spinor condensate of ^{87}Rb is released into free fall for up to 750 ms and probed with a T=130  ms Mach-Zehnder atom interferometer based on Bragg transitions. The Bragg interferometer simultaneously addresses the three magnetic states |m_{f}=1,0,-1⟩, facilitating a simultaneous measurement of the acceleration due to gravity with a 1000 run precision of Δg/g=1.45×10^{-9} and the magnetic field gradient to a precision of 120  pT/m.
authors.affiliation: Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Australian National University, Canberra 0200, Australia.
authors.forename: K S
authors.initials: KS
authors.lastname: Hardman
authors.affiliation: Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Australian National University, Canberra 0200, Australia.
authors.forename: P J
authors.initials: PJ
authors.lastname: Everitt
authors.affiliation: Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Australian National University, Canberra 0200, Australia.
authors.forename: G D
authors.initials: GD
authors.lastname: McDonald
authors.affiliation: Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Australian National University, Canberra 0200, Australia.
authors.forename: P
authors.initials: P
authors.lastname: Manju
authors.affiliation: Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Australian National University, Canberra 0200, Australia.
authors.forename: P B
authors.initials: PB
authors.lastname: Wigley
authors.affiliation: Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Australian National University, Canberra 0200, Australia.
authors.forename: M A
authors.initials: MA
authors.lastname: Sooriyabandara
authors.affiliation: Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Australian National University, Canberra 0200, Australia.
authors.forename: C C N
authors.initials: CC
authors.lastname: Kuhn
authors.affiliation: Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Australian National University, Canberra 0200, Australia.
authors.forename: J E
authors.initials: JE
authors.lastname: Debs
authors.affiliation: Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Australian National University, Canberra 0200, Australia.
authors.forename: J D
authors.initials: JD
authors.lastname: Close
authors.affiliation: Quantum Sensors and Atomlaser Lab, Department of Quantum Science, Australian National University, Canberra 0200, Australia.
authors.forename: N P
authors.initials: NP
authors.lastname: Robins