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

By Pascal Boehi, M. Riedel, J. Hoffrogge, J. Reichel, T. Haensch, Philipp Treutlein. 2009

184 citations recorded by the source corpus.

Entanglement-based technologies, such as quantum information processing, quantum simulations and quantum-enhanced metrology, have the potential to revolutionize our way of computing and measuring, and help clarify 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 set-ups. An important tool in this system is a potential depending on the internal atomic state. Coherent dynamics in such a potential combined with collisional interactions enables entanglement generation both for individual atoms and ensembles. Here, we demonstrate coherent manipulation of Bose-condensed atoms in a state-dependent potential, generated 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 to on-chip generation of many-particle entanglement and quantum-enhanced metrology with spin-squeezed states. Simultaneous coherent control of internal and motional states of a Bose–Einstein condensate has been demonstrated on an ‘atom chip’. The method should provide a route to generating many-particle entangled states, which are needed for entanglement-based technologies such as quantum-information processing or quantum-enhanced metrology.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/e21e7b2511832699afd8bde78f1f2b2209706b18

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Quantum metrology with nonclassical states of atomic ensembles (2016, background): “(63) with coefficients ~Ω = ~ΩR ∫ d3r ψ∗a(r)ψb(r), (66a) ~χ = Uaa + Ubb − 2Uab, (66b) Uij = 2π~2a(i,j)s M ∫ d3r |ψi(r)|2|ψj(r)|2, (66c) where ΩR is the Rabi frequency, a (a,a) s , a (b,b) s and a (a,b) s are the intra- and inter-species s-wave scattering lengths, and ψa,b(r) are single-particle mode”