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Browsing MIT Open Access Articles by Title

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  • Beals, Robert; Brierley, Stephen; Gray, Oliver; Harrow, Aram W.; Kutin, Samuel; Linden, Noah; Shepherd, Dan; Stather, Mark (Royal Society, The, 2013-02)
    We provide algorithms for efficiently moving and addressing quantum memory in parallel. These imply that the standard circuit model can be simulated with a low overhead by a more realistic model of a distributed quantum ...
  • Moix, Jeremy; Wu, Jianlan; Huo, Pengfei; Coker, David; Cao, Jianshu (American Chemical Society (ACS), 2011-11)
    The most recent crystal structure of the Fenna–Matthews–Olson (FMO) protein complex indicates the presence of an additional eighth chromophore, which has been proposed to serve as a link between the chlorosome and the ...
  • Wu, Jianlan; Liu, Fan; Shen, Young; Cao, Jianshu; Silbey, Robert J. (Institute of Physics Publishing, 2010-10)
    Understanding the mechanisms of efficient and robust energy transfer in light-harvesting systems provides new insights for the optimal design of artificial systems. In this paper, we use the Fenna–Matthews–Olson (FMO) ...
  • Wu, Jianlan; Liu, Fan; Ma, Jian; Silbey, Robert J.; Cao, Jianshu (American Institute of Physics (AIP), 2012-11)
    Following the calculation of optimal energy transfer in thermal environment in our first paper [J. L. Wu, F. Liu, Y. Shen, J. S. Cao, and R. J. Silbey, New J. Phys.12, 105012 (2010)], full quantum dynamics and leading-order ...
  • Mohseni, Masoud; Lloyd, Seth; Shabani, Alireza; Rabitz, Herschel (American Physical Society, 2012-07)
    The fundamental physical mechanisms of energy transfer in photosynthetic complexes is not yet fully understood. In particular, the degree of efficiency or sensitivity of these systems for energy transfer is not known given ...
  • Leiserson, Charles E.; Li, Liyun; Maza, Marc Moreno; Xie, Yuzhen (Springer-Verlag, 2010-09)
    Minimizing the evaluation cost of a polynomial expression is a fundamental problem in computer science. We propose tools that, for a polynomial P given as the sum of its terms, compute a representation that permits a more ...
  • Ahn, Donghwan; Kimerling, Lionel C.; Michel, Jurgen (American Institute of Physics (AIP), 2011-10)
    We studied evanescent wave coupling behavior between low index-contrast upper-level waveguides and thin-film Si and Ge photodetectors on SOI and germanium-on-insulator (GOI) substrates, respectively. We present a simple ...
  • Ansel, Jason Andrew; Pacula, Maciej; Amarasinghe, Saman P.; O'Reilly, Una-May (Association for Computing Machinery (ACM), 2011-07)
    Many real world problems have a structure where small problem instances are embedded within large problem instances, or where solution quality for large problem instances is loosely correlated to that of small problem ...
  • Babic, Ana; Berkmen, Melanie; Lee, Catherine; Grossman, Alan D. (American Society for Microbiology, 2011-03)
    Horizontal gene transfer contributes to evolution and the acquisition of new traits. In bacteria, horizontal gene transfer is often mediated by conjugative genetic elements that transfer directly from cell to cell. Integrative ...
  • Preis, Ami; Whittle, Andrew; Ostfeld, Avi; Perelman, Lina (American Society of Civil Engineers, 2011-07)
    This paper describes and demonstrates an efficient method for online hydraulic state estimation in urban water networks. The proposed method employs an online predictor-corrector (PC) procedure for forecasting future water ...
  • Bilgic, Berkin; Horn, Berthold Klaus Paul; Masaki, Ichiro (Institute of Electrical and Electronics Engineers (IEEE), 2010-06)
    We present an integral image algorithm that can run in real-time on a Graphics Processing Unit (GPU). Our system exploits the parallelisms in computation via the NIVIDA CUDA programming model, which is a software platform ...
  • Mavrokefalos, Anastassios; Han, Sang Eon; Yerci, Selcuk; Chen, Gang; Branham, Matthew Sanders (American Chemical Society (ACS), 2012-05)
    Thin-film crystalline silicon (c-Si) solar cells with light-trapping structures can enhance light absorption within the semiconductor absorber layer and reduce material usage. Here we demonstrate that an inverted nanopyramid ...
  • Han, Sang Eon; Mavrokefalos, Anastassios; Branham, Matthew Sanders; Chen, Gang (Society of Photo-optical Instrumentation Engineers, 2011-05)
    We examine light-trapping in thin crystalline silicon periodic nanostructures for solar cell applications. Using group theory, we show that light-trapping can be improved over a broad band when structural mirror symmetry ...
  • Sheng, Xing; Liu, Jifeng; Kozinsky, Inna; Michel, Jurgen; Kimerling, Lionel C.; Agarwal, Anuradha Murthy (Institute of Electrical and Electronics Engineers (IEEE), 2010-06)
    Thin film silicon solar cells are believed to be promising candidates for continuing cost reduction in photovoltaic panels because silicon usage could be greatly reduced. Since silicon is an indirect bandgap semiconductor, ...
  • Bravo-Abad, Jorge; Rodriguez, Alejandro W.; Joannopoulos, John D.; Rakich, P. T.; Johnson, Steven G.; Soljacic, Marin (American Institute of Physics, 2010-03)
    In this letter, we show theoretically how the light-confining properties of triply-resonant photonic resonators can be tailored to enable dramatic enhancements of the conversion efficiency of terahertz (THz) generation via ...
  • Hu, Xiaolong; Holzwarth, Charles W.; Masciarelli, Daniele; Dauler, Eric A.; Berggren, Karl K. (Institute of Electrical and Electronics Engineers, 2009-07)
    We designed superconducting nanowire single-photon detectors (SNSPDs) integrated with silver optical antennae for free-space coupling and a dielectric waveguide for fiber coupling. According to our finite-element simulation, ...
  • Indyk, Piotr; Ngo, Hung Q.; Rudra, Atri (Society for Industrial and Applied Mathematics / Association for Computing Machinery, 2010-01)
    We consider the following "efficiently decodable" non-adaptive group testing problem. There is an unknown string x 2 f0; 1gn [x is an element of set {0,1} superscript n] with at most d ones in it. We are allowed to ...
  • Kuindersma, Scott; Permenter, Frank Noble; Tedrake, Russell Louis (Institute of Electrical and Electronics Engineers (IEEE), 2014-05)
    We describe a whole-body dynamic walking controller implemented as a convex quadratic program. The controller solves an optimal control problem using an approximate value function derived from a simple walking model while ...
  • Shabani, A.; Kosut, R. L.; Mohseni, Masoud; Rabitz, H.; Broome, M. A.; Almeida, M. P.; White, A. G. (American Physical Society, 2011-03)
    The resources required to characterize the dynamics of engineered quantum systems—such as quantum computers and quantum sensors—grow exponentially with system size. Here we adapt techniques from compressive sensing to ...
  • Spring, Bryan Q.; Palanisami, Akilan; Zheng, Lei Zak; Blatt, Amy E.; Bryan Sears, R.; Hasan, Tayyaba (SPIE, 2013-09)
    We introduce immunofluorescence and automated image processing protocols for serial tumor sections to objectively and efficiently quantify tumor microvasculature following antivascular therapy. To determine the trade-off ...
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