In ion trap quantum information processing, efficient fluorescence collection is critical for fast, high-fidelity qubit detection and ion–photon entanglement. The expected size of future many-ion processors requires scalable light collection systems. We report on the development and testing of a microfabricated surface-electrode ion trap with an integrated high-numerical aperture (NA) micromirror for fluorescence collection. When coupled to a low-NA lens, the optical system is inherently scalable to large arrays of mirrors in a single device. We demonstrate the stable trapping and transport of 40Ca+ ions over a 0.63 NA micromirror and observe a factor of 1.9 enhancement of photon collection compared to the planar region of the trap.
.. epigraph:: “Helliwell achieves a rare clarity. For instance, the derivation of the standard kinematic results starting from Einstein's postulates is outstandingly clear. Throughout he shows an unusual and sympathetic appreciation of the problems that are faced by the beginning student.” -- John Taylor, University of Colorado .. epigraph:: “*Special Relativity* is definitely much better than the books I have read on this topic, and I would recommend it to any instructor who plans to teach a course on this topic. For anyone teaching special relativity as a part of a Modern Physics course, this book offers valuable supplementary reading.” -- Shirvel Stanislaus, Valparaiso University
A new class of observables is introduced which aims to characterize the superstructure of an event, that is, features, such as color flow, which are not determined by the jet four-momenta alone. Traditionally, an event is described as having jets which are independent objects; each jet has some energy, size, and possible substructure such as subjets or heavy flavor content. This description discards information connecting the jets to each other, which can be used to determine if the jets came from decay of a color- singlet object, or if they were initiated by quarks or gluons. An example superstructure variable, pull, is presented as a simple handle on color flow. It can be used on an event-by-event basis as a tool for distinguishing previously irreducible backgrounds at the Tevatron and the LHC.
J. T. Merrill, C. Volin, D. W. Landgren, J. M. Amini, K. Wright,, C. -S. Pai, H. Hayden, T. Killian, D. L. Faircloth, K. R. Brown, A. W. Harter, and R. E. Slusher
Demonstration of integrated microscale optics in surface-electrode ion trapsNew Journal of Physics 13 (2011) 103005.
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Generation of Nanoparticles of Controlled Size Using Ultrasonic Piezoelectric Oscillators in SolutionACS Applied Materials and Interfaces 2 (2010) 2360-2364.
Quantum Physics: a Fundamental Approach to Modern PhysicsUniversity Science Books, Sausalito, 2010.
Special RelativityUniversity Science Books, Sausalito, 2010.
and Matthew D. Schwartz
Seeing in Color: Jet SuperstructurePhysical Review Letters 105 (2010) 022001.
, , Joshua R. Puzey, , , , , , , S. Greenfield, and R. Epstein
Thermal links for the implementation of an optical refrigeratorJournal of Applied Physics 105 (2009) 013116.
, , , , , M. Maurer, W. Bang, I. V. Churina, J. Osterholz, I. Kim, T. Ditmire, and
Generation of Mie size microdroplet aerosols with applications in laser-driven fusion experimentsReview of Scientific Instruments 80 (2009) 063503.
, Harry A. Atwater, Vivian E. Ferry, Jeremy N. Munday, and Domenico Pacifici
How much can guided modes enhance absorption in thin solar cells?Optics Express 17 (2009) 20975-20990.
, K. W. Alt, , , , D. Tighe, M. J. Carey, J. A. Borchers, , and
Thickness of the Pinned Layer as a Controlling Factor in Domain Wall Formation During Training in IrMn-based Spin ValvesJournal of Applied Physics 103 (2008) 07C111.
, S. M. Watson, , , M. J. Carey, J. A. Borchers, , , and
Probing the Effect of Structural Roughness on Domain Wall Formation in Spin Valves Using the Off-Specular Reflectivity TechniqueIEEE Transactions on Magnetism 44 (2008) 2839-2841.