Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Sticlet, Doru"'
We investigate a specific limit of the one-dimensional non-Hermitian Hubbard Hamiltonian with complex interactions. In this framework, fermions with different spin quantum numbers are mapped onto two distinct spin species, resulting in two $XY$ spin
Externí odkaz:
http://arxiv.org/abs/2408.08110
Publikováno v:
Phys. Rev. B 108, 075133 (2023)
We investigate the decay of spatial correlations of $\mathcal{PT}$-symmetric non-Hermitian one-dimensional models that host higher-order exceptional points. Beyond a certain correlation length, they develop anomalous power-law behavior that indicates
Externí odkaz:
http://arxiv.org/abs/2304.10280
Autor:
Sticlet, Doru, Piéchon, Frédéric
Publikováno v:
Phys. Rev. B 107, 195404 (2023)
We study the continuum limit of two-dimensional chiral magnets in which Dzyaloshinskii-Moriya interaction (DMI) is due to the interplay between a smooth magnetic texture and spin-orbit coupling. The resulting free-energy density of the system contain
Externí odkaz:
http://arxiv.org/abs/2301.11855
Publikováno v:
Phys. Rev. B 107, 115111 (2023)
We study the dissipative dynamics of a one-dimensional bosonic system described in terms of the bipartite Bose-Hubbard model with alternating gain and loss. This model exhibits the $\mathcal{PT}$ symmetry under some specific conditions and features a
Externí odkaz:
http://arxiv.org/abs/2211.08707
Autor:
Ostahie, Bogdan, Sticlet, Doru, Moca, Cătălin Paşcu, Dóra, Balázs, Werner, Miklós Antal, Asbóth, János K., Zaránd, Gergely
Publikováno v:
Phys. Rev. B 108, 035126 (2023)
Recent experiments demonstrated that single-particle quantum walks can reveal the topological properties of single-particle states. Here, we generalize this picture to the many-body realm by focusing on multiparticle quantum walks of strongly interac
Externí odkaz:
http://arxiv.org/abs/2209.03569
Publikováno v:
Phys. Rev. B 106, 165411 (2022)
We perform a comparative study for the magnetization dynamics within linear response theory of one and two dimensional massive Dirac electrons, after switching on either a real (hermitian) or an imaginary (non-hermitian) magnetic field. While hermiti
Externí odkaz:
http://arxiv.org/abs/2205.04795
Publikováno v:
Phys. Rev. Lett. 128, 146804 (2022)
We consider a PT-symmetric Fermi gas with an exceptional point, representing the critical point between PT-symmetric and symmetry broken phases. The low energy spectrum remains linear in momentum and is identical to that of a hermitian Fermi gas. The
Externí odkaz:
http://arxiv.org/abs/2112.08294
Publikováno v:
Phys. Rev. B 105, 155409 (2022)
We theoretically study quantum transport through a quantum dot coupled to Majorana bound states confined at the ends of a topological superconducting nanowire. The topological superconductor forms a loop and is threaded by a tunable magnetic flux, wh
Externí odkaz:
http://arxiv.org/abs/2107.05410
Publikováno v:
Phys. Rev. B 104, 125113 (2021)
The Lindhard function represents the basic building block of many-body physics and accounts for charge response, plasmons, screening, Friedel oscillation, RKKY interaction etc. Here we study its non-Hermitian version in one dimension, where quantum e
Externí odkaz:
http://arxiv.org/abs/2105.12403
Publikováno v:
Phys. Rev. Lett. 128, 016802 (2022)
Linear response theory plays a prominent role in various fields of physics and provides us with extensive information about the thermodynamics and dynamics of quantum and classical systems. Here we develop a general theory for the linear response in
Externí odkaz:
http://arxiv.org/abs/2104.02428