Cavity-Based Single Atom Preparation and High-Fidelity Hyperfine State Readout

2010/02/23 by Roger Gehr, Jürgen Volz, Guilhem Dubois +7 · 10 citations
Computer Science · Physics and Astronomy · #Atom (system on chip) #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Coupling (piping) #Hyperfine structure #Materials science #Physics #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.1103/physrevlett.104.203602

published as Phys. Rev. Lett. 104, 203602 (2010) · 5 pages, 4 figures

arxiv created 2010/02/23 · openalex publication_date 2010/05/20 · arxiv updated 2010/11/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We prepare and detect the hyperfine state of a single 87Rb atom coupled to a fiber-based high-finesse cavity on an atom chip. The atom is extracted from a Bose-Einstein condensate and trapped at the maximum of the cavity field, resulting in a reproducibly strong atom-cavity coupling. We use the cavity reflection and transmission signal to infer the atomic hyperfine state with a fidelity exceeding 99.92% in a readout time of 100 μs. The atom is still trapped after detection.

Citations

• Strong atom–field coupling for Bose–Einstein condensates in an optical cavity on a chip
• Normal-Mode Spectroscopy of a Single-Bound-Atom–Cavity System
• Controlled exchange interaction between pairs of neutral atoms in an optical lattice

Cited by

• High precision micro-optical elements on fiber facets via focused-ion beam machining
• Coupling ultracold atoms to mechanical oscillators
• Single-shot optical readout of a quantum bit using cavity quantum electrodynamics
• Interaction Enhanced Imaging of Individual Rydberg Atoms in Dense Gases
• Dissipative preparation of steady Greenberger-Horne-Zeilinger states for Rydberg atoms with quantum Zeno dynamics
• Superresolution microscopy of optical fields using tweezer-trapped single atoms
• High mechanical bandwidth fiber-coupled Fabry-Perot cavity
• An integrated quantum repeater at telecom wavelength with single atoms in optical fiber cavities
• State-dependent fluorescence of neutral atoms in optical potentials
• Nonequilibrium properties of an atomic quantum dot coupled to a Bose-Einstein condensate

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• Cavity QED in a High NA Resonator
• Ultrafast high-fidelity state readout of single neutral atom
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• Cavity-enabled real-time observation of individual atomic collisions