Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Del Re, Lorenzo"'
Autor:
Del Re, Lorenzo
We explore a two-dimensional Hubbard model adapted to host altermagnetic states. Utilizing Hartree-Fock (HF) and dynamical mean field theory (DMFT), we uncover that the magnetic solutions of this model feature Dirac points in their spectrum. HF predi
Externí odkaz:
http://arxiv.org/abs/2408.14288
Autor:
Del Re, Lorenzo
Spontaneous symmetry breaking of interacting fermion systems constitutes a major challenge for many-body theory due to the proliferation of new independent scattering channels once absent or degenerate in the symmetric phase. One example is given by
Externí odkaz:
http://arxiv.org/abs/2312.16280
Autor:
Del Re, Lorenzo, Classen, Laura
We determine the ground states and excitation spectra of the paradigmatic four-flavour Heisenberg model with nearest- and next-nearest-neighbor exchange couplings on the triangular lattice in a field controlling the population imbalance of flavor pai
Externí odkaz:
http://arxiv.org/abs/2309.16601
Publikováno v:
SciPost Phys. 14, 048 (2023)
We consider the effect of a local interatomic repulsion on synthetic heterostructures where a discrete synthetic dimension is created by Raman processes on top of $SU(N)$-symmetric two-dimensional lattice systems. At a filling of one fermion per site
Externí odkaz:
http://arxiv.org/abs/2207.13973
Publikováno v:
PNAS 119 (33) e2205048119 (2022)
We study the fluctuations responsible for pairing in the $d$-wave superconducting state of the two-dimensional Hubbard model at intermediate coupling within a cluster dynamical mean-field theory with a numerically exact quantum impurity solver. By an
Externí odkaz:
http://arxiv.org/abs/2205.06286
We propose and demonstrate a unified hierarchical method to measure $n$-point correlation functions that can be applied to driven, dissipative, or otherwise open or non-equilibrium quantum systems. In this method, the time evolution of the system is
Externí odkaz:
http://arxiv.org/abs/2204.12400
Autor:
Rost, Brian, Del Re, Lorenzo, Earnest, Nathan, Kemper, Alexander F., Jones, Barbara, Freericks, James K.
We study an open quantum system simulation on quantum hardware, which demonstrates robustness to hardware errors even with deep circuits containing up to two thousand entangling gates. We simulate two systems of electrons coupled to an infinite therm
Externí odkaz:
http://arxiv.org/abs/2108.01183
Autor:
Tusi, Daniele, Franchi, Lorenzo, Livi, Lorenzo Francesco, Baumann, Karla, Orenes, Daniel Benedicto, Del Re, Lorenzo, Barfknecht, Rafael Emilio, Zhou, Tianwei, Inguscio, Massimo, Cappellini, Giacomo, Capone, Massimo, Catani, Jacopo, Fallani, Leonardo
Publikováno v:
Nature Physics, 18, pages 1201-1205 (2022)
A large repulsion between particles in a quantum system can lead to their localization, as it happens for the electrons in Mott insulating materials. This paradigm has recently branched out into a new quantum state, the orbital-selective Mott insulat
Externí odkaz:
http://arxiv.org/abs/2104.13338
Autor:
Del Re, Lorenzo, Rohringer, Georg
In this paper, we revisit the antiferromagnetic (AF) phase diagram of the single-band three-dimensional half-filled Hubbard model on a simple cubic lattice studied within the dynamical mean field theory (DMFT). Although this problem has been investig
Externí odkaz:
http://arxiv.org/abs/2104.11737
Autor:
Del Re, Lorenzo, Toschi, Alessandro
Publikováno v:
Phys. Rev. B 104, 085120 (2021)
We generalize the formalism of the dynamical vertex approximation (D$\Gamma$A) -- a diagrammatic extension of the dynamical mean-field theory (DMFT)-- to treat magnetically ordered phases. To this aim, we start by concisely illustrating the many-elec
Externí odkaz:
http://arxiv.org/abs/2011.04080