78 citations · 292 across the 17 of their papers we have counts for
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Theory of Spin Fluctuations in Striped Phases of Doped Antiferromagnetic Cuprates
Daniel Hone, A. H. Castro Neto
We study the properties of generalized striped phases of doped cuprate planar quantum antiferromagnets. We invoke an effective, spatially anisotropic, non-linear sigma model in two…
Magnetic-field and chemical-potential effects on the low-energy separation
J. M. P. Carmelo, A. H. Castro Neto
We show that in the presence of a magnetic field the usual low-energy separation of the Hubbard chain is replaced by a ``'' and ``'' separation. Here and refer to sma…
Electrons, pseudoparticles, and quasiparticles in the one-dimensional many-electron problem
J. M. P. Carmelo, A. H. Castro Neto
We generalize the concept of quasiparticle for one-dimensional (1D) interacting electronic systems. The and quasiparticles recombine the pseudoparticle co…
Motion of heavy particles coupled to fermionic and bosonic environments in one dimension
A. O. Caldeira, A. H. Castro Neto
Making use of a simple unitary transformation we change the hamiltonian of a particle coupled to an one dimensional gas of bosons or fermions to a new form from which the many body…
Pseudoparticle-operator description of an interacting Bose gas
A. H. Castro Neto, H. Q. Lin, H. -Y Chen +1
We write the Hamiltonian of the Bose gas with two-body repulsive -function potential in a pseudoparticle operator basis which diagonalizes the problem via the Bethe ansatz. In t…
Conservation laws and bosonization in integrable Luttinger liquids
J. M. P. Carmelo, A. H. Castro Neto, D. K. Campbell
We examine and explain the Luttinger-liquid character of models solvable by the Bethe ansatz by introducing a suitable bosonic operator algebra. In the case of the Hubbard chain, t…
New perturbation theory of low-dimensional quantum liquids II: operator description of Virasoro algebras in integrable systems
J. M. P. Carmelo, A. H. Castro Neto, D. K. Campbell
We show that the recently developed {\it pseudoparticle operator algebra} which generates the low-energy Hamiltonian eigenstates of multicomponent integrable systems also provides…
Dissipative quantum systems modeled by a two level reservoir coupling
A. O. Caldeira, A. H. Castro Neto, T. Oliveira de Carvalho
The coupling between a quantum dynamical system and a two-level system reservoir is analysed within the framework of the Feynman-Vernon theory. We stress the differences between th…
On Quantum Scattering of a System with Internal Degrees of Freedom
A. H. Castro Neto, A. O. Caldeira
We study the quantum tunnelling of a very complex object of which only part is coupled to an external potential ( the potential barrier ). We treat this problem as the tunnelling o…
Dynamical decoupling and Kac-Moody current representation in multicomponent integrable systems
J. M. P. Carmelo, A. H. Castro Neto
The conformal invariant character of -multicomponent integrable systems (with branches of gapless excitations) is described from the point of view of the response to curvatu…
An alternative approach for the dynamics of polarons in one dimension
A. H. Castro Neto, A. O. Caldeira
We developed a new method based on functional integration to treat the dynamics of polarons in one-dimensional systems. We treat the acoustical and the optical case in an unified m…