12 citations · 49 across the 11 of their papers we have counts for
12 papers
Quadratic XY-anisotropy correction to the spontaneous staggered magnetization of the gapped XYZ spin- chain
Felipe Taha Sant'Ana
The staggered order parameter of the gapped XYZ spin- chain follows from the eight-vertex solution, but in elliptic variables that fix the Hamiltonian couplings only implicitl…
Entanglement asymmetry in the gapped XYZ spin- chain
Felipe Taha Sant'Ana
The entanglement asymmetry measures how strongly a symmetry is broken inside a subsystem. Analytic results at equilibrium have so far covered free theories and, perturbatively, the…
Canonical-ensemble scaling of Tan's contact in the trapped Tonks--Girardeau gas
Felipe Taha Sant'Ana
We derive the canonical-ensemble scaling of Tan's contact for harmonically trapped Tonks--Girardeau bosons at finite temperature in the large- limit. The leading scaling coe…
Weak-Coupling Limit of the Lattice Nonlinear Schrödinger Integral Equation
Felipe Taha Sant'Ana
We study the ground-state integral equation of the quantum lattice nonlinear Schrödinger model, equivalently the isotropic Heisenberg XXX chain at spin , whose solution is…
Two-spinon effects on the thermal Tonks-Girardeau gas
Felipe Taha Sant'Ana, Hui Liu
We study the effects of the two-spinon excitations on the field-field correlator of the Tonks-Girardeau gas. While these excitations have been previously examined in the ground sta…
Kubo-Martin-Schwinger relation for an interacting mobile impurity
Oleksandr Gamayun, Miłosz Panfil, Felipe Taha Sant'Ana
In this work we study the Kubo-Martin-Schwinger (KMS) relation in the Yang-Gaudin model of an interacting mobile impurity. We use the integrability of the model to compute the dyna…
Mobile impurity in a one-dimensional gas at finite temperatures
Oleksandr Gamayun, Miłosz Panfil, Felipe Taha Sant'Ana
We consider the McGuire model of a one-dimensional gas of free fermions interacting with a single impurity. We compute the static one-body function and momentum distribution of the…
The relevant excitations for the one-body function in the Lieb-Liniger model
Miłosz Panfil, Felipe Taha Sant'Ana
We study the ground state one-body correlation function in the Lieb-Liniger model. In the spectral representation, correlations are built from contributions stemming from different…
A study on quantum gases: bosons in optical lattices and the one-dimensional interacting Bose gas
Felipe Taha Sant'Ana
Bosonic atoms confined in optical lattices are described by the Bose-Hubbard model and can exist in two different phases, Mott insulator or superfluid, depending on the strength of…
Scaling properties of the Tan's contact: embedding pairs and correlation effect in the Tonks limit
F. T. Sant'Ana, F. Hébert, V. Rousseau +2
We study the Tan's contact of a one dimensional quantum gas of N repulsive identical bosons confined in a harmonic trap at finite temperature. This canonical ensemble framework cor…
Finite-temperature degenerate perturbation theory for bosons in optical lattices
Felipe Taha Sant'Ana, Axel Pelster, Francisco Ednilson Alves dos Santos
Bosonic atoms confined in optical lattices can exist in two different phases, Mott-insulator and superfluid, depending on the strength of the system parameters, such as the on-site…
Improving Mean-Field Theory for Bosons in Optical Lattices via Degenerate Perturbation Theory
M. Kübler, F. T. Sant'Ana, F. E. A. dos Santos +1
The objective of this paper is the theoretical description of the Mott-insulator to superfluid quantum phase transition of a Bose gas in an optical lattice. In former works the Ray…