| Issue Date | Title | Author(s) | Type | Access |
| 2000 | Long-wave fluctuations of the two-dimensional Heisenberg antiferromagnet | Belinicher, Victor ; Providência, João da | article | openAccess |
| 2007 | Lowering the critical temperature with eight-quark interactions | Osipov, A. A. ; Hiller, B. ; Moreira, J. ; Blin, A. H. ; Providência, J. da | article | openAccess |
| 1985 | Mean field theories with mixed states | Providência, João da ; Fiolhais, Carlos | article | openAccess |
| 4-Mar-1985 | Mean-filed theories with mixed states and associated boson expansions | Providência, João da ; Fiolhais, C. | article | openAccess |
| 2002 | Microscopic Theory of the Two-Dimensional Quantum Antiferromagnet in a Paramagnetic Phase | Belinicher, V. I. ; Providência, J. da | article | openAccess |
| 2006 | Multi-quark interactions with a globally stable vacuum | Osipov, A. A. ; Hiller, B. ; Providência, J. da | article | openAccess |
| 6-Jan-2015 | New boson realization of the Lipkin model obeying the su(2)-algebra | Tsue, Yasuhiko ; Providência, Constança ; Providencia, João da ; Yamamura, Masatoshi | article | openAccess |
| 2017 | A note on the Lipkin model in arbitrary fermion number | Tsue, Yasuhiko ; Providência, Constança ; Providência, João da ; Yamamura, Masatoshi | article | openAccess |
| 1990 | A note on thermal bosons | Providência, João da ; Fiolhais, Carlos | article | openAccess |
| 2006 | The numerical range of 2-dimensional Krein spaces operators | Nakazato, Hiroshi ; Bebiano, Natália ; Providência, João da | preprint | openAccess |
| 2004 | Numerical ranges of unbounded operators arising in quantum physics | Bebiano, N. ; Lemos, R. ; Providência, J. da | article | openAccess |
| 2003 | On generalized numerical ranges of operators on an indefinite inner product space | Bebiano, N. ; Lemos, R. ; Providência, J. da ; Soares, G. | preprint | openAccess |
| 2007 | On the corners of certain determinantal ranges | Kovačec, Alexander ; Bebiano, Natália ; Providência, João da | article | openAccess |
| 2009 | On the Courant-Fischer theory for Krein spaces | Bebiano, N. ; Nakazato, H. ; Providência, J. da | article | openAccess |
| 2005 | On the geometry of numerical ranges in spaces with an indefinite inner product | Bebiano, N. ; Lemos, R. ; Providência, J. da ; Soares, G. | article | openAccess |
| 1990 | On the random phase approximation based on the thermo field dynamics formalism | Yamamura, Masatoshi ; Providência, João da ; Kuriyama, Atsushi ; Fiolhais, Carlos | article | openAccess |
| 2016 | A possible framework of the Lipkin model obeying the SU(n) algebra in arbitrary fermion number. I: The SU(2) algebras extended from the conventional fermion pair and determination of the minimum weight states | Tsue, Yasuhiko ; Providência, Constança ; Providência, João da ; Yamamura, Masatoshi | article | openAccess |
| 2016 | A possible framework of the Lipkin model obeying the SU(n) algebra in arbitrary fermion number. II: Two subalgebras in the SU(n) Lipkin model and an approach to the construction of a linearly independent basis | Tsue, Yasuhiko ; Providência, Constança ; Providência, João da ; Yamamura, Masatoshi | article | openAccess |
| 2017 | A practical scheme for constructing the minimum-weight states of the su(n)-Lipkin model in arbitrary fermion number | Tsue, Yasuhiko ; Providência, Constança ; Providência, João da ; Yamamura, Masatoshi | article | openAccess |
| 2008 | Product of diagonal entries of the unitary orbit of a 3-by-3 normal matrix | Nakazato, Hiroshi ; Bebiano, Natália ; Providência, João da | article | openAccess |
