2012/12/31 by B. Prasanna Venkatesh, D. H. J. O’Dell, D. H. J. O'Dell
Chemistry · Computer Science · Physics and Astronomy · #Atom (system on chip) #Atomic physics #Bloch oscillations #Cavity quantum electrodynamics #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Electric field #Mechanical and Optical Resonators #Noise (video) #Open quantum system #Optical lattice #Oscillation (cell signaling) #Physics #Quantum #Quantum Information and Cryptography #Quantum electrodynamics #Quantum fluctuation #Quantum mechanics #Quantum noise #Quasiparticle #Ultracold atom #cond-mat.quant-gas #physics.atom-ph #physics.optics #quant-ph
paper · pdf · doi:10.1103/physreva.88.013848
published as Phys. Rev. A 88, 013848 (2013) · 25 pages, 14 figures
openalex publication_date 2013/07/29 · arxiv created 2013/07/30 · arxiv updated 2013/07/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We extend our theory of Bloch oscillations of cold atoms inside an optical cavity [Venkatesh et al., Phys. Rev. A 80, 063834 (2009)] to include the effects of quantum noise arising from coupling to external modes. The noise acts as a form of quantum measurement backaction by perturbing the coupled dynamics of the atoms and the light. We take it into account by solving the Heisenberg-Langevin equations for linearized fluctuations about the atomic and optical mean fields and examine how this influences the signal-to-noise ratio of a measurement of external forces using this system. In particular, we investigate the effects of changing the number of atoms, the intracavity lattice depth, and the atom-light coupling strength, and show how resonances between the Bloch oscillation dynamics and the quasiparticle spectrum have a strong influence on the signal-to-noise ratio, as well as heating effects. One of the hurdles we overcome in this paper is the proper treatment of fluctuations about time-dependent mean fields in the context of cold-atom cavity QED.