2010/09/03 by Stuart S. Szigeti, Michael R. Hush, Michael Hush +4 · 1 citation
Mathematics · Physics and Astronomy · #Advanced Frequency and Time Standards #Algorithm #Atom (system on chip) #Atom laser #Atomic and Subatomic Physics Research #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Contrast (vision) #Field (mathematics) #Laser #Laser linewidth #Mathematics #Mode (computer interface) #Nonlinear system #Optics #Phase (matter) #Physics #Quantum electrodynamics #Quantum mechanics #State (computer science) #Statistical physics #cond-mat.quant-gas #physics.atom-ph
paper · pdf · doi:10.1103/physreva.82.043632
published as S. S. Szigeti, M. R. Hush, A. R. R. Carvalho and J. J. Hope, Phys. Rev. A 82, 043632 (2010) · 12 pages, 5 figures
arxiv created 2010/09/03 · openalex publication_date 2010/10/29 · arxiv updated 2013/02/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The linewidth of an atom laser is limited by density fluctuations in the Bose-Einstein condensate (BEC) from which the atom laser beam is outcoupled. In this paper we show that a stable spatial mode for an interacting BEC can be generated using a realistic control scheme that includes the effects of the measurement backaction. This model extends the feedback theory, based on a phase-contrast imaging setup, presented by Szigeti, Hush, Carvalho, and Hope [Phys. Rev. A 80, 013614 (2009)]. In particular, it is applicable to a BEC with large interatomic interactions and solves the problem of inadequacy of the mean-field (coherent state) approximation by utilizing a fixed number state approximation. Our numerical analysis shows the control to be more effective for a condensate with a large nonlinearity.