{"id":279,"date":"2019-11-19T15:03:33","date_gmt":"2019-11-19T20:03:33","guid":{"rendered":"https:\/\/www.bu.edu\/physics\/?post_type=profile&p=279"},"modified":"2023-09-14T10:46:53","modified_gmt":"2023-09-14T14:46:53","slug":"david-campbell","status":"publish","type":"profile","link":"https:\/\/www.bu.edu\/physics\/profile\/david-campbell\/","title":{"rendered":"David Campbell"},"content":{"rendered":"

Research Interests:<\/h3>\n

Correlated electronic systems, nonlinear excitations, and non-equilibrium phenomena<\/strong><\/p>\n

My research covers three distinct but overlapping areas. With my students and other collaborators, I have investigated correlated electronic systems in reduced spatial dimensions, ranging from conducting polymers through superconducting organic charge transfer salts to graphene and other two-dimensional electronic membranes. Many of these studies have employed a version of the functional Renormalization Group (fRG) that I developed with several colleagues. I have continued my long-term interest in solitons and other nonlinear excitations to studies of \u201cintrinsic localized modes\u201d (ILMs) in solids and in Bose Einstein Condensates (BECs) trapped in optical lattices. Finally. Continuing my interest in the non-equilibrium problem first studied by Fermi, Pasta, Ulam, and Tsingou (FPUT), I am working with collaborators on the so-called \u201cmetastable\u201d state that arises in many FPUT simulations and delays (or perhaps prevents) the approach to true thermodynamic equilibrium.<\/p>\n

Selected Publications:<\/h3>\n

D. K. Campbell, D. Baeriswyl, and S. Mazumdar, \u201cCorrelations and Defect Energies,\u201d Phys. Rev. Lett<\/em>. 56<\/strong>, 1509 (1986)<\/p>\n

D. K. Campbell, \u201cSolitons and Polarons in Quasi-One-Dimensional Conducting Polymers and Related Materials,\u201d 111-147 in Molecular Electronic Devices II<\/em>, F. Carter, ed., (Marcel Dekker, 1987).<\/p>\n

D. Baeriswyl, D. K. Campbell, and S. Mazumdar, \u201cAn Overview of the Theory of \u03c0-Conjugated Polymers,\u201d pp. 7-134 in Conjugated Conducting Polymers<\/em>, H. Kiess, ed., (Springer Verlag, 1992).<\/p>\n

S. Mazumdar, S. Rasmasesha, R. T. Clay and D. K. Campbell, \u201cTheory of Coexisting Charge and Spin-Density Waves in (TMTTF)2<\/sub>Br, (TMTSF)2<\/sub>PF6<\/sub> and alpha-(BEDT-TTF)2<\/sub>MHg(SCN)4<\/sub>,\u201d Phys. Rev. Lett<\/em>. 82<\/strong>, 1522-1525 (1999).<\/p>\n

K. M. Tam, S. W. Tsai, and D. K. Campbell, \u201cFunctional renormalization group analysis of the half-filled one-dimensional extended Hubbard model,\u201d Phys. Rev. Lett<\/em>. 96<\/strong> 036408 (2006).<\/p>\n

S. Viola-Kusminskiy, D. K. Campbell, and A. H. Castro Neto, \u201cElectron-electron interactions in graphene bilayers,\u201d EuroPhysics Letters<\/em> 85<\/strong>, 58005 (2009).<\/p>\n

Ka-Ming Tam, Shan-Wen Tsai, and David K. Campbell, \u201cDominant superconducting fluctuations in the 1D extended Holstein-extended Hubbad model,\u201d Phys. Rev. B<\/em> 89<\/strong> 014513 (2014).<\/p>\n

Salvatore D. Pace, Kevin A. Reiss, and David K. Campbell, \u201cThe Beta Fermi-Pasta-Ulam- Tsingou Recurrence Problem,\u201d Chaos<\/em> 29<\/strong>, 113107 (2019).<\/p>\n

Kevin A. Reiss and David K. Campbell, \u201cThe Metastable State of Fermi-Pasta-Ulam-Tsingou Models,\u201d <\/em>Entropy<\/em> 2023 25, 300 https:\/\/doi\/10.3390\/e25020300<\/a> (2023)<\/p>\n

For a full list of publications, please see the attached CV<\/a>.<\/p>\n

Honors\/Awards:<\/h3>\n