Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Villari, Leone Di Mauro"'
Starting from a simple dipole-conserving Hamiltonian model, after introducing a proper quantisation framework, we construct the linear-response theory of a fracton quantum gas. We show how to consistently construct the density operator and we calcula
Externí odkaz:
http://arxiv.org/abs/2308.05670
We discuss the numerical implementation of two related representations of fermionic density matrices which have been introduced in Annals of Physics 370, 12 (2016). In both of them, the density matrix is expanded in a basis of Bargmann coherent state
Externí odkaz:
http://arxiv.org/abs/2304.08034
In this work we investigate the effect of a constant external, or artificial, magnetic field on the nonlinear response of 2D Weyl materials. We calculate the Landau Levels for tilted cones in 2D Weyl materials by treating the tilting in a perturbativ
Externí odkaz:
http://arxiv.org/abs/2209.04295
Publikováno v:
Phys. Rev. B 106, 035401, 2022
We present a study of the nonlinear optical response of twisted bilayer graphene. We discuss the contribution of the Berry phase to the non-linearity when inversion symmetry is broken, thus underlining the interplay between band and real space geomet
Externí odkaz:
http://arxiv.org/abs/2207.04456
We present a theoretical model to study the nonlinear optical response of materials with a low-energy spectrum characterised by strongly tilted, type-II, Weyl cones in two dimensions, which we call 2D Weyl materials. Our findings reveal that the tilt
Externí odkaz:
http://arxiv.org/abs/2201.10894
Publikováno v:
Phys. Rev. A 102, 033321 (2020)
In this paper we study a mean field model for the dynamics of an interacting Bose-Einstein condensate in two dimensional pseudo-relativistic materials. This model is relatively simple, but contains stable solutions called oscillons which are absent i
Externí odkaz:
http://arxiv.org/abs/1908.10641
In this work we determine how the description of a four-dimensional Schwarzschild-anti de Sitter black hole affects the topological calculation of its Hawking temperature. It is shown that a two-dimensional approach is required due to the presence of
Externí odkaz:
http://arxiv.org/abs/1903.04627
We introduce a calculation, based on purely topological reasoning, of the global equilibrium Hawking temperature of the Schwarzschild-de Sitter spacetime, where a Schwarzschild black hole horizon coexists with a de Sitter cosmological horizon. Our me
Externí odkaz:
http://arxiv.org/abs/1902.02547
Publikováno v:
Phys. Rev. D 99, 044042 (2019)
In this work we determine that the Hawking temperature of black holes possesses a purely topological nature. We find a very simple but powerful formula, based on a topological invariant known as the Euler characteristic, which is able to provide the
Externí odkaz:
http://arxiv.org/abs/1810.09322
We show that any soliton solution of an arbitrary two-dimensional integrable equation has the potential to eventually evaporate and emit the exact analogue of Hawking radiation from black holes. From the AKNS matrix formulation of integrability, we s
Externí odkaz:
http://arxiv.org/abs/1808.09099