168 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidade de São PauloBR31 papers
- Instituto Tecnológico de AeronáuticaBR21 papers
- Universidade Federal FluminenseBR13 papers
- Universidade Federal do Rio de JaneiroBR12 papers
- Center for Astrophysics Harvard & SmithsonianUS4 papers
- Harvard UniversityUS4 papers
- Universidade Estadual Paulista (Unesp)BR4 papers
- Universidade Federal da ParaíbaBR4 papers
- Universidade Federal Rural de PernambucoBR4 papers
- ETH ZurichCH3 papers
- Université Libre de BruxellesBE3 papers
- Aarhus UniversityDK2 papers
3 papers · 1 filter
The Atiyah-Singer index theorem and the gauge field copy problem
Adonai S. Sant'Anna, Newton C. A. da Costa, Francisco A. Doria
K-theory allows us to define an analytical condition for the existence of `false' gauge field copies through the use of the Atiyah-Singer index theorem. After establishing that res…
Bounds on Correlation Functions of Quantum Rotators
Oscar Bolina, J. Rodrigo Parreira
We derive a McBryan-Spencer bound to the correlation function of a one-dimensional array of quantum rotators in the Villain approximation of the cosine interaction. We obtain the p…
Effective Hamiltonians and Phase Diagrams for Tight-Binding Models
Nilanjana Datta, Roberto Fernandez, Juerg Froehlich
We present rigorous results for several variants of the Hubbard model in the strong-coupling regime. We establish a mathematically controlled perturbation expansion which shows how…