Single-atom transistor as a precise magnetic field sensor

Abstract

Feshbach resonances, which allow for tuning the interactions of ultracold atoms with an external magnetic field, have been widely used to control the properties of quantum gases. We propose a~scheme for using scattering resonances as a probe for external fields, showing that by carefully tuning the parameters it is possible to reach a $10^{-5}$G (or nT) level of precision with a single pair of atoms. We show that for our collisional setup it is possible to saturate the quantum precision bound with a simple measurement protocol.

References in corpus (12)

• Many-Body Physics with Ultracold Gases
• New Limits on Coupling of Fundamental Constants to Gravity Using ${}^{87}$Sr Optical Lattice Clocks
• Precision Test of Mass Ratio Variations with Lattice-Confined Ultracold Molecules
• High-Resolution Magnetometry with a Spinor Bose-Einstein Condensate
• Single Ion Quantum Lock-In Amplifier
• Number of closed-channel molecules in the BEC-BCS crossover
• Analytical solutions for the dynamics of two trapped interacting ultracold atoms
• Three-dimensional strong localization of matter waves by scattering from atoms in a lattice with a confinement-induced resonance
• Enhancement of variation of fundamental constants in ultracold atom and molecule systems near Feshbach resonances
• Effective-range description of a Bose gas under strong one- or two-dimensional confinement
• Low-entropy states of neutral atoms in polarization-synthesized optical lattices
• Control of Ultra-cold Inelastic Collisions by Feshbash Resonances and Quasi-One-Dimensional Confinement