Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Ali G. Moghaddam"'
Publikováno v:
Physical Review Research, Vol 6, Iss 4, p 043167 (2024)
We propose a network-model realization of magnetic higher-order topological phases (HOTPs) in the presence of the combined space-time symmetry C_{4}T—the product of a fourfold rotation and time-reversal symmetry. We show that the system possesses t
Externí odkaz:
https://doaj.org/article/050478b7a098457a939204390feeedab
Autor:
Lotte Mertens, Ali G. Moghaddam, Dmitry Chernyavsky, Corentin Morice, Jeroen van den Brink, Jasper van Wezel
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043084 (2022)
Synthetic horizons in models for quantum matter provide an alternative route to explore fundamental questions of modern gravitational theory. Here we apply these concepts to the problem of emergence of thermal quantum states in the presence of a hori
Externí odkaz:
https://doaj.org/article/8dffd4b42286402db4da76fe630ab54b
Autor:
Gabriele Naselli, Ali G. Moghaddam, Solange Di Napoli, Verónica Vildosola, Ion Cosma Fulga, Jeroen van den Brink, Jorge I. Facio
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p 033198 (2022)
We analyze the electronic structure of topological surface states in the family of magnetic topological insulators MnBi_{2n}Te_{3n+1}. We show that, at natural-cleavage surfaces, the Dirac cone warping changes its symmetry from hexagonal to trigonal
Externí odkaz:
https://doaj.org/article/271df8f38c324dc59d2e2bc4a4e3b128
Autor:
Viktor Könye, Corentin Morice, Dmitry Chernyavsky, Ali G. Moghaddam, Jeroen van den Brink, Jasper van Wezel
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p 033237 (2022)
To simulate the dynamics of massless Dirac fermions in curved space-times with one, two, and three spatial dimensions, we construct tight-binding Hamiltonians with spatially varying hoppings. These models represent tilted Weyl semimetals where the ti
Externí odkaz:
https://doaj.org/article/2757694136624db0ae2a16e05f8d4e71
Publikováno v:
PRX Quantum, Vol 3, Iss 3, p 030335 (2022)
In certain special circumstances, such as in the vicinity of a black hole or in a uniformly accelerating frame, vacuum fluctuations appear to give rise to a finite-temperature environment. This effect, currently without experimental confirmation, can
Externí odkaz:
https://doaj.org/article/d642fa4498294bcbbf4301521047eb84
Autor:
Corentin Morice, Ali G. Moghaddam, Dmitry Chernyavsky, Jasper van Wezel, Jeroen van den Brink
Publikováno v:
Physical Review Research, Vol 3, Iss 2, p L022022 (2021)
We propose a class of lattice models realizable in a wide range of setups whose low-energy dynamics exactly reduces to Dirac fields subjected to (1+1)-dimensional [(1+1)D] gravitational backgrounds, including (anti-)de Sitter space-time. Wave packets
Externí odkaz:
https://doaj.org/article/e0949fa63f68427781b0625d055d0a37
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p 023200 (2022)
We present universal characteristics of quantum entanglement and topology through virtual entanglement modes that fluctuate into existence in subsystem measurements. For generic interacting systems and extensive conserved quantities, these modes give
Externí odkaz:
https://doaj.org/article/0166461985fa4adab78b89223b8c10d8
Autor:
Ali G. Moghaddam, Dmitry Chernyavsky, Corentin Morice, Jasper van Wezel, Jeroen van den Brink
Publikováno v:
SciPost Physics, Vol 11, Iss 6, p 109 (2021)
We investigate the spectral properties of one-dimensional lattices with position-dependent hopping amplitudes and on-site potentials that are smooth bounded functions of the position. We find an exact integral form for the density of states (DOS)
Externí odkaz:
https://doaj.org/article/4a367817788f4af98558d07b4b0bf614
Autor:
Viktor Könye, Lotte Mertens, Corentin Morice, Dmitry Chernyavsky, Ali G. Moghaddam, Jasper van Wezel, Jeroen van den Brink
We show that tilted Weyl semimetals with a spatially varying tilt of the Weyl cones provide a platform for studying analogues to problems in anisotropic optics as well as curved spacetime. Considering particular tilting profiles, we numerically evalu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a085f705f3c5e3d116a0eb51ef0bc28e
We demonstrate that dislocations in two-dimensional non-Hermitian systems can give rise to density accumulation or depletion through the localization of an extensive number of states. These effects are shown by numerical simulations in a prototype la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8724835a9760d2222a8059834ef1e49
https://trepo.tuni.fi/handle/10024/136999
https://trepo.tuni.fi/handle/10024/136999