32 citations · 81 across the 10 of their papers we have counts for
9 papers
Long-time equilibration can determine transient thermality
Karen V. Hovhannisyan, Somayyeh Nemati, Carsten Henkel +1
When two initially thermal many-body systems start interacting strongly, their transient states quickly become non-Gibbsian, even if the systems eventually equilibrate. To see beyo…
Coupling function from bath density of states
Somayyeh Nemati, Carsten Henkel, Janet Anders
Modelling of an open quantum system requires knowledge of parameters that specify how it couples to its environment. However, beyond relaxation rates, realistic parameters for spec…
Quantum correlations in the spin-1/2 Heisenberg XXZ chain with modulated Dzyaloshinskii-Moriya interaction
F. Khastehdel Fumani, B. Beradze, S. Nemati +2
We study a one-dimensional spin-1/2 XXZ Heisenberg model with alternating Dzyaloshinskii- Moriya interaction, using the numerical Lanczos method. Recently, the ground state (GS) ph…
Fidelity approach: the misleading role of finite size level crossing of excited energies
Somayyeh Nemati, Fatemeh Khastehdel Fumani, Saeed Mahdavifar
Here, we show that, although quantum fidelity can truly identify two quantum phase transitions of a one-dimensional spin-1/2 quantum Ising model with competing nearest and next-nea…
One-particle spectral function singularities in a one-dimensional gas of spin-1/2 fermions with repulsive delta-function interaction
T. Cadez, S. Nemati, J. M. P. Carmelo
The momentum, fermionic density, spin density, and interaction dependencies of the exponents that control the (momentum-energy)-plane singular features of the one-fermion spectral…
Absence of ballistic charge transport in the half-filled 1D Hubbard model
J. M. P. Carmelo, S. Nemati, T. Prosen
Whether in the thermodynamic limit of lattice length infinite, hole concentration tending to zero, nonzero temperature, and U/t > 0 the charge stiffness of the 1D Hubbard model wit…
Magnetic Entanglement in Spin-1/2 XX Chains
Fatemeh Khastehdel Fumani, Somayyeh Nemati, Saeed Mahdavifar +1
In the study of entanglement in a spin chain, people often consider the nearest-neighbor spins. The motivation is the prevailing role of the short range interactions in creating qu…
From fidelity to entanglement of entropy of the one-dimensional transverse-field quantum compass model
Mostafa Motamedifar, Somayyeh Nemati, Saeed Mahdavifar +1
We study fidelity and fidelity susceptibility by addition of entanglement of entropy in the one-dimensional quantum compass model in a transverse magnetic field numerically. The wh…
Concurrence and entanglement entropy in a dimerized spin-1/2 two-leg ladder
Somayyeh Nemati, Saeed Mahdavifar, Saeed Batebi
We consider the isotropic spin-1/2 two-leg ladders with the dominant spatially modulated rung exchanges. We study the effect of a uniform magnetic field on the ground state phase d…