2001/12/20 by A. André, Mikhail D. Lukin, M. D. Lukin · 75 citations
Mathematics · Physics and Astronomy · #Atom (system on chip) #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Condensed matter physics #Heisenberg limit #Limit (mathematics) #Mathematics #Physics #Quantum #Quantum decoherence #Quantum electrodynamics #Quantum entanglement #Quantum mechanics #Quantum optics and atomic interactions #Spin (aerodynamics) #quant-ph
paper · pdf · doi:10.1103/physreva.65.053819
published in Physical Review A 65(5) (American Physical Society) · 15 pages, 8 figures
arxiv created 2001/12/20 · openalex publication_date 2002/05/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We analyze a model for spin squeezing based on the so-called countertwisting Hamiltonian, including the effects of dissipation and finite system size. We discuss the conditions under which the Heisenberg limit, i.e., phase sensitivity \ensuremath∝1/N, can be achieved. A specific implementation of this model based on atom-atom interactions via quantized photon exchange is presented in detail. The resulting excitation corresponds to the creation of spin-flipped atomic pairs and can be used for fast generation of entangled atomic ensembles, spin squeezing, and applications in quantum information processing. The conditions for achieving strong spin squeezing with this mechanism are also analyzed.