Coherent manipulation of Bose–Einstein condensates with state-dependent microwave potentials on an atom chip

2009/04/30 by Pascal Böhi, Pascal Boehi, Max F. Riedel +5 · 210 citations
Computer Science · Physics and Astronomy · #Astronomical interferometer #Atom (system on chip) #Atom interferometer #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Interferometry #Mesoscopic physics #Open quantum system #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum computer #Quantum entanglement #Quantum information #Quantum mechanics #Quantum metrology #Quantum network #Quantum sensor #Quantum state #Quantum technology #quant-ph

paper · pdf · doi:10.1038/nphys1329

published in Nature Physics 5(8), 592-597 (Nature Portfolio) · 9 pages, 6 figures

openalex publication_date 2009/07/05 · arxiv created 2010/09/13 · arxiv updated 2010/09/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Entanglement-based technologies, such as quantum information processing, quantum simulations, and quantum-enhanced metrology, have the potential to revolutionise our way of computing and measuring and help clarifying the puzzling concept of entanglement itself. Ultracold atoms on atom chips are attractive for their implementation, as they provide control over quantum systems in compact, robust, and scalable setups. An important tool in this system is a potential depending on the internal atomic state. Coherent dynamics in this potential combined with collisional interactions allows entanglement generation both for individual atoms and ensembles. Here, we demonstrate coherent manipulation of Bose-condensed atoms in such a potential, generated in a novel way with microwave near-fields on an atom chip. We reversibly entangle atomic internal and motional states, realizing a trapped-atom interferometer with internal-state labelling. Our system provides control over collisions in mesoscopic condensates, paving the way for on-chip generation of many-particle entanglement and quantum-enhanced metrology with spin-squeezed states.

Citations

• Coherence in Microchip Traps
• Strong atom–field coupling for Bose–Einstein condensates in an optical cavity on a chip
• Very long storage times and evaporative cooling of cesium atoms in a quasielectrostatic dipole trap
• Spin squeezing in a bimodal condensate: spatial dynamics and particle losses
• Extracting atoms on demand with lasers
• Quantum Spin Dynamics of Mode-Squeezed Luttinger Liquids in Two-Component Atomic Gases
• The Physical Implementation of Quantum Computation
• Making, probing and understanding Bose-Einstein condensates

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• Speeding up the spatial adiabatic passage of matter waves in optical microtraps by optimal control
• Magnetic-field-insensitive coherent-population-trapping resonances excited by bichromatic linearly polarized fields on the D₁ line of ¹³³Cs
• All-optical Raman control of ultracold atomic hyperfine states using pulsed jump protocol
• A microfabricated ion trap with integrated microwave circuitry