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Author Hojman, S.A. pdf  url
openurl 
  Title Origin of conical dispersion relations Type Journal Article
  Year 2014 Publication Revista Mexicana De Fisica Abbreviated Journal Rev. Mex. Fis.  
  Volume 60 Issue 5 Pages 336-339  
  Keywords Quantum mechanics; modified Dirac-Kronig-Penney potential; conical dispersion relations  
  Abstract A mechanism that produces conical dispersion relations is presented. A Kronig Penney one dimensional array with two different strengths delta function potentials gives rise to both the gap closure and the dispersion relation observed in graphene and other materials. The Schrodinger eigenvalue problem is locally invariant under, the infinite dimensional Virasoro algebra near conical dispersion points in reciprocal space, thus suggesting a possible relation to string theory.  
  Address [Hojman, Sergio A.] Univ Adolfo Ibanez, Dept Ciencias, Fac Artes Liberales, Fac Ingn & Ciencias, Santiago, Chile, Email: sergio.hojman@uai.cl  
  Corporate Author Thesis  
  Publisher Soc Mexicana Fisica Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0035-001x ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000341802200001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 409  
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Author Hojman, S.A.; Asenjo, F.A. doi  openurl
  Title Classical and Quantum Dispersion Relations Type Journal Article
  Year 2020 Publication Physica Scripta Abbreviated Journal Phys. Scr.  
  Volume 95 Issue 8 Pages 7 pp  
  Keywords Quantum Hamilton-Jacobi equation; Bohm potential; dispersion relation  
  Abstract It is showed that, in general, classical and quantum dispersion relations are different due to the presence of the Bohm potential. There are exact particular solutions of the quantum (wave) theory which obey the classical dispersion relation, but they differ in the general case. The dispersion relations may also coincide when additional assumptions are made, such as WKB or eikonal approximations, for instance. This general result also holds for non-quantum wave equations derived from classical counterparts, such as in ray and wave optics, for instance. Explicit examples are given for covariant scalar, vectorial and tensorial fields in flat and curved spacetimes.  
  Address [Hojman, Sergio A.] Univ Adolfo Ibanez, Fac Artes Liberales, Dept Ciencias, Santiago 7491169, Chile, Email: sergio.hojman@uai.cl;  
  Corporate Author Thesis  
  Publisher Iop Publishing Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0031-8949 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000543208700001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1184  
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