Community structure of the physical review citation network |
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| Authors: | P Chen S Redner |
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| Institution: | 1. Eindhoven University of Technology, Department of Mathematics and Computer Science, P.O. Box 513, 5600 MB Eindhoven, The Netherlands;2. University of Twente, Department of Applied Mathematics, P.O. Box 217, 7500 AE Enschede, The Netherlands;3. Centre for Science and Technology Studies, Leiden University, P.O. Box 905, 2300 AX Leiden, The Netherlands;1. Complex Systems Unit, Aalto University School of Science, P.O. Box 12200, FI-00076, Finland;2. Robert Bosch LLC, Palo Alto, CA 94304, USA;3. Mechanisms and Design Lab, Hewlett Packard Enterprise Labs, Palo Alto, CA, USA;1. Chair of Systems Design, ETH Zurich, 8092 Zurich, Switzerland;2. Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, PR China;3. Department of Radiation Oncology, Inselspital, Bern University Hospital and University of Bern, 3010 Bern, Switzerland;4. Department of Physics, University of Fribourg, 1700 Fribourg, Switzerland;5. Guangdong Province Key Laboratory of Popular High Performance Computers, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen 518060, PR China;1. Policy Development Team, Strategy and Cooperation Division, Korea Research Institute of Chemical Technology, 141 Gajeongro, Yuseong, Daejeon, 305-343, Republic of Korea;2. Department of Management Science, KAIST, 335 Gwahakro, Yuseong, Daejeon 305-701, Republic of Korea;3. Future Strategy Team, Daegu Digital Industry Promotion Agency, 2139-12, Nam-gu, Daegu, 705-701, Republic of Korea |
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| Abstract: | We investigate the community structure of physics subfields in the citation network of all Physical Review publications between 1893 and August 2007. We focus on well-cited publications (those receiving more than 100 citations), and apply modularity maximization to uncover major communities that correspond to clearly identifiable subfields of physics. While most of the links between communities connect those with obvious intellectual overlap, there sometimes exist unexpected connections between disparate fields due to the development of a widely applicable theoretical technique or by cross fertilization between theory and experiment. We also examine communities decade by decade and also uncover a small number of significant links between communities that are widely separated in time. |
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