666 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidade Federal do Rio de JaneiroBR289 papers
- Universidade de São PauloBR215 papers
- Centro Brasileiro de Pesquisas FísicasBR188 papers
- Centre National de la Recherche ScientifiqueFR165 papers
- Universidade Estadual de Campinas (UNICAMP)BR156 papers
- Universidade Federal do ABCBR123 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di NapoliIT103 papers
- Radboud University NijmegenNL103 papers
- Universidad Nacional Autónoma de MéxicoMX101 papers
- Universidade do Estado do Rio de JaneiroBR98 papers
- Consejo Nacional de Investigaciones Científicas y TécnicasAR94 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR94 papers
82 papers · 1 filter
Real-space topology and charge order in the Haldane-Holstein Model
Sebastião dos Anjos Sousa-Júnior, Julián Faúndez, Tarik P. Cysne +2
We study the half-filled Haldane-Holstein model, where a paradigmatic Chern insulator is coupled to fully dynamical phonons, and provide an unbiased characterization of how retarde…
Kondo effect in a two-dimensional electron gas in the Persistent Spin Helix regime
T. O. Puel, M. A. Manya, G. S. Diniz +2
The Kondo effect arises from many-body interactions between localized magnetic impurities and conduction electrons, affecting electronic properties at low temperatures. In this stu…
Suppression of the Mott insulating phase in the particle-hole asymmetric Hubbard model
Mateus Marques, Bruno M. de Souza Melo, Alexandre R. Rocha +2
We explore the phase diagram of the Mott metal-insulator transition (MIT), focusing on the effects of particle-hole asymmetry (PHA) in the single-band Hubbard model. Our dynamical…
Spin-state ordering and intermediate states in the mixed-valence cobalt oxyborate CoOBO with spin crossover
E. Granado, C. W. Galdino, B. D. Moreno +2
Spin-state ordering - a periodic pattern of ions with different spin-state configurations along a crystal lattice - is a rare phenomenon, and its possible interrelation with other…
Quantum impurity with 2/3 local moment in 1D quantum wires: an NRG study
P. A. Almeida, M. A. Manya, M. S. Figueira +3
We study a Kondo state that is strongly influenced by its proximity to an w^-1/2 singularity in the metallic host density of states. This singularity occurs at the bottom of the ba…
Trace distance between fermionic Gaussian states from a truncation method
Jiaju Zhang, M. A. Rajabpour
In this paper, we propose a novel truncation method for determining the trace distance between two Gaussian states in fermionic systems. For two fermionic Gaussian states, characte…
The cumulant Green's functions method for the Hubbard model
Renan Lira, Peter Riseborough, Jereson Silva-Valencia +1
We study the single-band Hubbard model under the action of an external magnetic field using the cumulant Green's functions method (CGFM). The starting point of the method is to dia…
Quantum correlations, entanglement spectrum and coherence of two-particle reduced density matrix in the Extended Hubbard Model
Diego L. B. Ferreira, Thiago O. Maciel, Reinaldo O. Vianna +1
We study the ground state properties of the one-dimensional extended Hubbard model at half-filling from the perspective of its particle reduced density matrix. We focus on the redu…
Atomic frustration-based twistronics
W. N. Mizobata, J. E. Sanches, M. Penha +5
We theoretically investigate atomic frustrated states in diatomic molecules hosted by the bilayer graphene setup twisted by the first magic angle and with broken inversion symmetry…
Entanglement entropy in quantum spin chains with broken parity number symmetry
Arash Jafarizadeh, M. A. Rajabpour
Consider a generic quantum spin chain that can be mapped to free quadratic fermions via Jordan-Wigner (JW) transformation. In the presence of arbitrary boundary magnetic fields, th…
Structural and spectroscopic investigation of the charge-ordered, short-range ordered, and disordered phases of the CoOBO ludwigite
C. W. Galdino, D. C. Freitas, C. P. C. Medrano +13
In this work, we investigate the representative case of the homometallic Co ludwigite CoCoOBO ( space group) with four distinct Co crystallographic si…
Superconductor-insulator transition induced by pressure within the X-boson approach
Lizardo H. C. M. Nunes, M. S. Figueira, E. V. L. de Mello
The pressure induced superconducting phase diagram is calculated for an extension of the periodic Anderson model (PAM) in the limit taking into account the effect of…
Study of the Kondo and high-temperature limits of the slave-boson and X-boson methods
Lizardo H. C. M. Nunes, M. S. Figueira, M. E. Foglio
In this Letter we study the periodic Anderson model, employing both the slave-boson and the X-boson approaches in the mean field approximation. We investigate the breakdown of the…
Lattice Bisognano-Wichmann modular Hamiltonian in critical quantum spin chains
Jiaju Zhang, Pasquale Calabrese, Marcello Dalmonte +1
We carry out a comprehensive comparison between the exact modular Hamiltonian and the lattice version of the Bisognano-Wichmann (BW) one in one-dimensional critical quantum spin ch…
Entanglement and boundary entropy in quantum spin chains with arbitrary direction of the boundary magnetic fields
J. C. Xavier, M. A. Rajabpour
We calculate the entanglement and the universal boundary entropy (BE) in the critical quantum spin chains, such as the transverse field Ising chain and the XXZ chain, with arbitrar…
Multidimensional dark space and its underlying symmetries: towards dissipation-protected qubits
Raul A. Santos, Fernando Iemini, Alex Kamenev +1
Quantum systems are always subject to interactions with an environment, typically resulting in decoherence and distortion of quantum correlations. It has been recently shown that a…
Quantitative comparison of Anderson impurity solvers applied to transport in quantum dots
Bruno Max de Souza Melo, Luis G. G. V. Dias da Silva, Alexandre Reily Rocha +1
We study the single impurity Anderson model (SIAM) using the equations of motion method (EOM), the non-crossing approximation (NCA), the one-crossing approximation (OCA), and Wilso…
Bipartite entanglement entropy of the excited states of the free fermions and the harmonic oscillators
Arash Jafarizadeh, M. A. Rajabpour
We study general entanglement properties of the excited states of the one dimensional translational invariant free fermions and coupled harmonic oscillators. In particular, using t…
Area law and universality in the statistics of subsystem energy
Khadijeh Najafi, M. A. Rajabpour
We introduce Rényi entropy of a subsystem energy as a natural quantity which closely mimics the behavior of the entanglement entropy and can be defined for all the quantum many bod…
Magnon excitations and quantum critical behavior of the ferromagnet URuGe
M. P. Nascimento, M. A. Continentino, A. López +8
We present an extensive study of the ferromagnetic heavy fermion compound URuGe. Measurements of electrical resistivity, specific heat and magnetic properties show that…
Light-cone velocities after a global quench in a non-interacting model
Khadijeh Najafi, M. A. Rajabpour, J. Viti
We study the light-cone velocity for global quenches in the non-interacting XY chain starting from a class of initial states that are eigenstates of the local -component of the…
Non-topological parafermions in a one-dimensional fermionic model with even multiplet pairing
Leonardo Mazza, Fernando Iemini, Marcello Dalmonte +1
We discuss a one-dimensional fermionic model with a generalized even multiplet pairing extending Kitaev chain. The system shares many features wit…
From Kondo to local singlet state in graphene nanoribbons with magnetic impurities
G. S. Diniz, G. I. Luiz, A. Latgé +1
A detailed analysis of the Kondo effect of a magnetic impurity in a zigzag graphene nanoribbon is addressed. An adatom is coupled to the graphene nanoribbon via a hybridization amp…
Full counting statistics of the subsystem energy in the free fermions and the quantum spin chains
Khadijeh Najafi, M. A. Rajabpour
We calculate the full counting statistics (FCS) of a subsystem energy in free fermionic systems by means of the Grassmann variables. We demonstrate that the generating function of…