Zobrazeno 1 - 10
of 58
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:
Habib Rostami, Ali G Moghaddam
Publikováno v:
JPhys Materials, Vol 8, Iss 1, p 015001 (2024)
In magnetic topological insulators, the surface states can exhibit a gap due to the breaking of time-reversal symmetry. Various experiments, while suggesting the existence of the surface gap, have raised questions about its underlying mechanism in th
Externí odkaz:
https://doaj.org/article/288ffd272d50421da7a331844a1200a9
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
Autor:
Corentin Morice, Dmitry Chernyavsky, Jasper van Wezel, Jeroen van den Brink, Ali G. Moghaddam
Publikováno v:
SciPost Physics Core, Vol 5, Iss 3, p 042 (2022)
We investigate the wave packet dynamics and eigenstate localization in recently proposed generalized lattice models whose low-energy dynamics mimic a quantum field theory in (1+1)D curved spacetime with the aim of creating systems analogous to black
Externí odkaz:
https://doaj.org/article/50ea59d0e05d4e29a8ab2f3cfe03f65f
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